Soft Proofing slows LR5

When making a soft proof copy it brings any additional adjustment almost to a halt in LR5. Windows 7 64bit, Quad core processer, 12gig ram.
Is this normal or do ii need to change a setting?
PS
Same when working on a vitural raw copy.

Similar Messages

Bug: Previews not generated properly when Soft Proofing is enabled in LR5, LR5.2 RC

I am experiencing problems with previews in Lightroom 5.0 and Lightroom 5.2 RC.
I have noticed incorrect previews under the following circumstances when Soft Proofing is enabled:
1. When I make modifications (like cropping), the preview in the Navigator panel does not update until I uncheck (and recheck) the Soft Proofing option.
2. When I am paging through several images at 100% or greater, the view in the main window, while zoomed in correctly, does not provide the correct resolution (blurry) until I either uncheck (and recheck) the Soft Proofing option or zoom out and zoom back in.
I am using:
Lightroom 5.0 64-bit, Lightroom 5.2 RC 64-bit
Windows 7 Ultimate 64-bit
Canon CR2 RAW files
16GB RAM, plenty of local disk space
Note: I have not done extensive testing on this, but many of these files are stored on a network drive, so I don't know if there is some sort of bug in the optimized routines for network drives/folders.

I have the same problem as michaeln2 and adobe 1230931.
I use Lightroom 4.4.
When I am in the Develop screen and I turn on Soft Proofing, then about 20% of the time the image goes blank. If I go back to Library view and reenter Devleop, sometimes the image will show up, sometimes not. If I advance to other images, sometimes they'll show and sometimes not in the Soft Proofing mode. Sometimes rotating an image in Library mode and going back into Develop "wakes up" the Soft Proofing and sometimes not.
In other words, the soft proofing feature is, as michaeln2 says, functionally useless. I'm surprised that no fix has been posted on this thread. No point upgrading to Ver 5 either...as it seems to be buggy there as well. Help!

Soft proofing quit working in 4.2 update

the Cloud just updated my Photoshop CC to 14.2 and now the soft proofing feature doesn't work properly. It slows the machine to a crawl and only shows unlinked blocks of proofs. It was working fine inm the last version.
Thanks anyone for helping

I am having the same problem with Apple TV 2 - My children's movies are showing all songs. Comedy movies the same.
I have changed 8 movies (meta tags) and call them kids movies, go to the Apple TV2 and shows all songs. When I update the genre and called the movies genres "business" it seems to fix it. I don't see any rime or reason.
I can't understand it - never had this problem with Apple TV 1
Thoughts?
I just bought the Apple TV and it was on 4.2 and now I am on 4.22

Soft proofing problem with wide-gamut monitor

Hi,
I've just upgraded to a wide-gamut monitor (Dell U2713H).
I set the colour-space to adobe RGB when using Lightroom (I'm on LR5).
When I select soft proofing , my picture goes grey (that is, where I was displaying the photo in the border, then changes to a uniform grey within the proofing border). If I click on 'create proof copy' the picture then displays.
When the picture is grey and I move my mouse over the image, I can see the RGB% values change, as if there is an image there.
Previously, I had a (rather) low-end viewsonic and had no problems - Soft-Proofing worked fine. All I did was install the new monitor.
I'm running windows 7, nvidia 8800GT card, 8gb memory. No system changes prior/after changing the monitor.
Everything else on the monitor works fine (better than fine, actually, it is a great monitor)
Soft-proofing in photoshop (CS6) works fine, for what that is worth.
I'm a bit stumped. Can anyone help?
hans

1234ewqrd wrote:
I set the colour-space to adobe RGB when using Lightroom (I'm on LR5).
What do you mean by this? Are you selecting Adobe RGB as color profile for you rmonitor? Or are you talking about selecting Adobe RGB as softproofing color space in Lr?
The fact that your images are grey in Lr is a strong indication that your new monitor is not calibrated and is way off the chart. It might be brand new but that does not mean that its tonality and color display is correct for photo editing in Lr.
Calibration is done with a piece of hardware called a spectrometer and the accompanying software. Brand names are Spyder, ColorMunki, GretaghMacbeth. After calibration the software creates a profile that is used by the monitor.
You don't select any other profile than the profile created by calibration and profiling for photo editing - irrespective of which program you use for photo editing.
In the meantime - as a temporary remedy and until you get the calibration tools - you can set your monitor to sRGB. Be aware that sRGB is a much smaller color space than what you rmonitor is able to display; with sRGB you basically prevent the monitor from displaing wide gamut.
See here on how to set the monitor to sRGB:
http://members.lightroomqueen.com/index.php?/Knowledgebase/Article/View/1137/188/how-do-i- change-my-monitor-profile-to-check-whether-its-corrupted
http://forums.adobe.com/message/4977176#4977176
Everything else on the monitor works fine (better than fine, actually, it is a great monitor)
You have no way of telling if the monitor works fine, i.e. if the monitor has the correct intensity (brightness) and if it displays the colors correctly, i.e. as a true representation of the color numbers. Our brain automatically adjusts colors to what they ought to be. What we see is basically unreliable for photo editing. Only a calibrated monitor will display the colors correctly.
Also, when you calibrate select an intensity (brightness) of araound 110 cd/m2 - irrespective of what the software suggests. Often monitors are way to bright which results in prints that are too dark.

Costco and soft proofing show dull washed out image

OK, so I am trying to utilize my nearest costco to print some images from lightroom 5. I am getting back dull washed out prints.
Facts:
I shoot in RAW in manual mode
I am using sRGB when I do my post processing
I export to jpg for printing
I used the costco LR5 plugin from Alloyphoto to upload to Costco
I have installed the printer profiles from drycreek for the specific location/printer and have chosen the correct profile as I export
I made sure that I chose to have Costco NOT autocorrect the color
Even when I use LR5's soft proofing, I get the same result on my monitor
I checked the print I got back and it says that they did NOT autocorrect (taken with a grain of salt)
The machine they are using is a Noritsu QSS-A, so I know my profile is correct
I have attached a screen shot of what I am seeing.
Why am I seeing this on my soft proofing as well as my prints?
How can I solve this and get vibrant prints?
Any advice would be helpful.
Message was edited by: moviebuffking

moviebuffking wrote:
I have calibrated my monitor as good as I can get without specific hardware. I have 18 years experience calibrating monitors (via optical media and my eyes), so I know that mine is very close.
It is virtually impossible to "accurately" set the Luminance, Gamma, and Color temperature "by eye." This is most likely the cause of your prints not matching the screen image you see in LR. That being the monitor's Luminance (i.e. Brightness) level is too set to high.
http://www.northlight-images.co.uk/article_pages/colour_management/prints_too_dark.html
To see if this could be your problem I downloaded the posted screen shot and cropped out the 'Copy' image, which has your adjustments applied to it. Here are my results:
Click on image to see full-size
I needed to apply a full F stop (+1.0 EV) of Exposure correction to achieve a good midtone brightness level for the print image. You'll notice I also added -50 Highlights and +50 Shadows along with +25 Vibrance. I bet the image with my adjustments added looks way too bright on your uncalibrated monitor.
You have two (2) issues–Monitor Calibration and LR Basic Panel Control Adjustments
Monitior Calibration
I would highly recommend investing in a hardware monitor calibrator such as the X-Rite i1 Display and ColorMunki, or Datacolor Spyder models. If you tell me what make and model monitor you are using I can recommend specific calibrators.
Temporarily you can try adjusting the monitor "by eye" to get it closer to the desired 120cd/m2 Luminance, 2.2 Gamma, and 6500K Color Temperature using the test patterns at this site:
http://www.lagom.nl/lcd-test/
When the monitors Brightness and Contrast controls have been correctly set the screen image should look much closer to the prints you have recently made with the LR Soft Proof adjustments. So in fact you will be adjusting the monitor to make it look bad with the LR adjustments you applied. The proper monitor settings will make the Lagom test patterns look correct AND should make your bad Costco prints now match the screen image using you original LR settings.
After changing the monitor's Brightness and Contrast settings try readjusting a few of the image files you had printed and send them to Costco as check prints. Compare them again to your monitor's screen image. They should be much better!
LR Basic Panel Tone Control Adjustment
LR's PV2012 Tone controls can provide much improvement to your raw image Highlight and Shadow detail. Start with all of the Tone controls at their '0' default settings and adjust them from the top-down in the order shown below.
1. Set Exposure for the midtone brightness ignoring the highlight and shadow areas for now. Setting Exposure about +.5 EV higher than what looks correct for the midtones seems to work best with most images.
2. Leave Contrast at 0 for now. You’ll adjust this after the first pass.
3. Adjust Highlights so that blown out areas are recovered and “fine tonal detail” is revealed.
4. Adjust Shadows to reveal fine detail in dark areas. For most normal images simply setting -Shadows = +Highlights (Example -50 and +50) works very well.
5. The Whites control sets the white clipping point, which you can see by holding down the ALT key as you move the slider. Adjust it to the point where you see clipping just appear with the ALT key.
6. The Blacks control sets the black clipping point, which you can see by holding down the ALT key as you move the slider. Adjust it to the point where you see clipping just appear with the ALT key.
7. Now go back and adjust the Contrast control to establish the best midtone contrast.
8. Lastly touchup the Exposure control for the best midtone brightness.
9. If necessary “touch-up” the controls using the same top-down workflow.
moviebuffking wrote:
Am I correct in assuming that the soft proof (with a certain profile) is a "preview" of what that print will look like?
Soft Proof does two things. It shows you what the image's colors will look like in the target color space (i.e. printer profile). You can see what (if any) colors are "out of gamut" by clicking on the small icon in the upper-righthand corner of the Histogram. You can also see if any of the colors fall out of your monitor's gamut by clicking on the small icon in the upper-lefthand corner of the Histogram.
When you check 'Simulate Paper & Ink' the Soft Proof image's contrast and color saturation are changed to make it look closer to what the "reflective" print image will look like when held next to the monitor for comparison. Many people have difficulty using 'Simulate Paper & Ink' since it requires using precise light levels for viewing the print and a well calibrated monitor.
In summary my best suggestion is to purchase and use a good hardware monitor calibrator on a scheduled basis to insure you have an "accurate" screen image inside LR and other color managed applications like PS.

Regarding SOFT PROOFING:

I almost always use LR5 for prints and on the same printer and paper combination. Should I be doing my whole workflow with Soft Proofing "on"? If not, due to different outputs, doesn't that mean that you must do the entire set of adjustments over for each type of output?

MrScoobydoobee wrote:
I almost always use LR5 for prints and on the same printer and paper combination. Should I be doing my whole workflow with Soft Proofing "on"? If not, due to different outputs, doesn't that mean that you must do the entire set of adjustments over for each type of output?
I would suggest that you do your general LR processing on the basis of what looks good on the screen, as a general-purpose image, prioritising tone and hue that best portray the picture content - the optimum material for your output-specific processing to work on. Softproofing is way too specific for this stage, IMO.
When it then comes to considering a particular output, only then would one (optionally) use softproofing - but LR will automatically generate a proofing (virtual) copy if you change anything while in this mode. You will therefore not be altering the processing of the main image version. This won't get into a "tug-of-love" between the varying requirements of different outputs, but stand apart from those issues.
The specific adjustments you make in response to what softproofing tells you, are insulated within that separate virtual version (which is named with the softproof profile used). This need involve only a small subset of the LR adjustments, you don't need to start from scratch. Perhaps one may add just toning, print aspect ratio crop, and paper-specific tonecurve tweaks over the top of the general-purpose edit; whatever is called for. Maybe even save these into a Develop preset, if they are expected to be re-usable with other images that may undergo the same output.
Then your final LR output can itself apply output sharpening, resampling, output profile etc on the fly, to suit each particular case, regardless whether softproof has been used or not.
RP

Preview: Colour management/soft proofing?

I've finally had it with Acrobat (it's slow, buggy, argghh) and would like to use Preview as my main PDF viewer. I like the colour management settings in Acrobat and found the colour rendition faithful. I use it to soft proof files for press printing.
Is there any colour management settings in Preview?
It would be nice to know that what I'm seeing is representative of the file's colours.
Cheers, Lee.

You should only have to embed the profile used in Illustrator. It should be easy to check if it works. Save an identical PDF image out of Illustrator and Photoshop so you have both a vector and raster images to compare. Save one with a profile embedded and one without for each image. View both of them in Preview. At the same time, open them in Acrobat. Does the color look the same in one or the other? Also, what version of Acrobat are you using? Version 7 is much faster at loading and display than 6.

Display profiles and soft proofing Windows RGB / Monitor RGB

This might have asked before, but I did not find any definite answer for this. Sorry this gets a bit long.
Short question:
What's the difference between softproofing with Windows RGB and Monitor RGB targets? I see differences in my image between these targets.
Long question(s):
Here's some reasoning.. let me know when I go wrong.
I have hardware calibrated my display Spyder 3 elite to sRGB standard. I have understood that the generated display profile contains a LUT table that affects gamma values for each RGB component, so that affects both gamma and color temperature. That table is loaded into video card when Windows starts. In addition to the LUT table, the display profile contains what? Probably information on what color space the display has been calibrated to. Does that matches directly with the LUT table information, but may deviate from sRGB in the case my monitor cannot reproduce sRGB 100%?
Now if I have image that that is in sRGB, but the embedded sRGB profile has been stripped away, should any non color management aware image viewer show the colors properly, if it is assumed that 1) my monitor can handle full sRGB space and 2) my monitor was succesfully calibrated to sRGB and the LUT table has been loaded into video card?
Or does it still require a color management aware program to show the image, which implies that the LUT table information alone is not enough and the display profile contains some extra information that is needed to show the image correctly? I would think this is true, as I needed to turn on color management in Canon Zoom Browser to see images in it the same way as in Photoshop.
Now to the original question, what's the difference in Photoshop when soft proofing with Windows RGB and Monitor RGB targets
I read from www.gballard.net that
Photoshop can effectively "SoftProof" our web browser color:
Photoshop: View> Proof SetUp> Windows RGB
Photoshop's Soft Proof screen preview here simulates how unmanaged applications, web browsers, will display the file on 2.2 gamma monitors, based on the sRGB profile. If the file is based on sRGB and our monitor gamma is 2.2 and D/65 6500 degrees Kelvin, we should see very little shift here, which is the goal.
Photoshop: View> Proof SetUp> Monitor RGB
THIS IS WHERE the color-brightness-saturation problem will repeat consistantly.
Soft Proofing Monitor RGB here strips-ignores the embedded ICC profile and Assigns-Assumes-Applies the Monitor profile or color space.
The color and density changes seen here show the difference between the monitor profile and the source profile sRGB.
I'm not sure how to read that. Assume here that my monitor has been calibrated to sRGB and the PS working space sRGB. Do in both cases photoshop strip away color profile from the image at first? What happens after that? Does in Windows RGB case Photoshop pass the color values as they are to display? What does it do in "Monitor RGB" case then? Does it assign my monitor profile to the image? If it does, does there also happen conversion from one color space to another? In either one conversion there must happen as the soft proofing results are different. Does either one cause "double profiling" to the image as the monitor is already calibrated?
Thanks

Windows defaults to sRGB if you don't calibrate your monitor so untagged sRGB files should display (more or less) correctly in applications that don't know about color management on systems with uncalibrated monitors.
When proofing against Windows RGB you're proofing against sRGB, it will show you how applications that don't know about color management on an uncalibrated monitor will show the image. This is what you proof against if you want to see how the image will display in web browsers.
When you proof against Monitor RGB, Photoshop will assign your monitor's icc profile to the image which tends to be utterly useless most of the time.

Can I soft proof in LR4 like I can in PS CS5?

I haven't used LR 4 yet, but did view the soft-proofing tutorial.
I applaud Adobe for adding this functionality in LR4. It was one of the most obvious lacking features in the previous version, and I've still been mostly doing all my printing through PS CS5.
While soft-proofing is not a perfect replacement for test printing, I've been mostly satisfied with proofing in CS5.
Proofing in LR4 seems a little different, but by using a virtual copy it looks like if I use my printer/paper profile I should theoretically be able to not only be able to deal with color gamut issues, but also adjust contrast & brightness to more closely match my original developed image, and could compare the original with virtual copy in compare mode. Is it that simple? And if so, why is there a contrast & brightness adjustment in the Print module? That latter adjustment would be similar to what one goes through in PS CS5 when soft-proofing prior to printing. However, why have it if it can be done in the Develop module......and regardless, from the video tutorial it looks like you can't preview the image after making those adjustments in the print module nor compare it with the original......thus forcing one to make multiple prints until the result is satisfactory.
Just seems to me there is a bit more tweaking to do in LR4 to make the soft-proofing more functional. Or, perhaps I'm too stuck with the paradigm set forth for soft-proofing in PS and need someone to clarify how I can achieve the same result in LR just as confidently.

Beaulin Liddell wrote:
BTW, I've benefited immensly from your and Martin's Evenings books.......you've never steered me wrong.
Thanks for the kind words...but LR4's soft proofing is worth the effort to use. It really is better than Photoshop's soft proofing. I'm still on the fence regarding VCs vs Snapshots for soft proofing It's a tossup but the VC part has been built in while making a snapshot wasn't.
The advantage of LR4's soft proofing is you get the ability to do a Before/After while still using the full range of LR4's controls to adjust the printed version. Makes it really easy to nail great print (assuming you have good print profiles).
As for the Print module Brightness and Contradt...that's really a special case that doesn't involved color managed output. It's a crutch for those who don't have a locked down system. It's east to tweak but you have to make example prints since the controls don't actually display but only impact the output. I tend to avoid that.

Soft proofing: how to A/B?

Hi all,
I'm kinda new to soft proofing, so maybe this is a silly question, but here goes:
My workflow for printing is that i first tweak my photos so they look like how i want them on my computer monitor, for uploading to Flickr.
After that i choose the one(s) i want to print (Epson 3880) and go into "soft proofing" mode.
After i've tweaked the photo to compensate for the print, i want to A/B with my original. What i've noticed is that i need to generally add a bit more brightness and vibrance to approach (on physical paper) what i see on my computer screen, so i want to be able to A/B between my original photo and the proof copy.
But the thing is, when i do this the "soft proofing" module remains engaged for both my proof copy (that's ok) and for my original photo (not ok!) which was tweaked to look good on the computer and never meant to be printed, and on which i never did any soft proofing!!!
This makes it really hard to A/B between the two copies.
So why doesn't the soft proofing module automatically turn off when you switch to another photo on which you haven't done any soft proofing?
Hmmm, clear as mud methinks!
But does anyone see what i mean and could offer any tips?
Thanks! ......... D

Daz V wrote:
So why doesn't the soft proofing module automatically turn off when you switch to another photo on which you haven't done any soft proofing?
Soft Proofing "simulates" on your computer display (transmissive) what the print copy (reflective) will look like in your hands. The two are radically different in contrast ratio, black level, and white level achievable, so it makes little sense to try and compare the two. They will always look quite different. The goal is to adjust web based images so they look good onscreen, and print based images with 'Soft Proof' so they look good in the actual reflective light viewed print copy. What are you trying to achieve?
You can view them side-by-side by windowing LR and your browser and viewing the image in both at the same time. In fact that would be much close to reality, since browsers aren't always properly color managed. Two separate displays would be even better for this purpose.

Is It Possible to Save a Soft-Proofed File?

Let's assume that I have an image, foo.psd, open in PSCS4. I softproof the image for a particular paper and printer. When I hit Ctrl-Y, the image is shown in softproof mode, and the softproofing info is appended to the image name in the PSCS4 window. Is there any way to save a copy of foo.psd with the soft proofing applied, i.e. foo-softproof.psd?
Reed

Reed,
a print looks often different to the monitor. Quite normal
- many monitor colors cannot be printed.
They are out-of gamut for the printing CMYK space.
The RGB image data are converted via the RGB profile
to Lab, which is large enough to represent real world
photos without loss.
From Lab the data are converted to CMYK via the CMYK
profile. Here is loss because of the smaller gamut.
The colors have to be mapped from the larger RGB gamut
into the smaller CMYK gamut. This can be done
a) automatically by Rendering Intent Relative Colorimetric:
in-gamut colors are not changed. Out-of-gamut colors
are mapped to the gamut boundary; this process isn't
accurately defined by standards.
b) automatically by Rendering Intent Perceptual:
all colors - even those which were in-gamut - are
shifted towards the gray axis. This process depends
very much on the scientist or programmer and is nowhere
defined by standards.
So far one doesn't need human interaction, but the results
are not always pleasing. The third and optimal method is
c) image based gamut compression. Reduce the saturation
and eventually rotate the hue in regions which are out-
of-gamut until Photoshop's Proof Color Gamut Warning
doesn't show larger out-of-gamut areas.
Gamut compression algorithms and the color science behind
are explained in this excellent book:
Jan Morovic (accents omitted)
Color Gamut Mapping
John Wiley & Sons, 2008
Manual image based gamut compression is demonstrated here
by many examples (but it's called 'Editing in Lab'):
http://www.fho-emden.de/~hoffmann/labproof15092008.pdf
Attention: 3.4 MBytes.
Chapter 9 shows visualized gamut boundaries for several
color spaces.
IMO you're seeking the impossible (if I'm understanding
you correctly).
Best regards --Gernot Hoffmann

Colors in print preview not matching colors in soft proofing

Hi There,
Just wanted to print a new photo and realized that the colors in print preview do not match the colors in soft proofing. In both cases I selected the same icc profile and rendering method. The print colors matched the colors in print preview. I never had a problem so far. All new prints will be checked with soft proofing and adjusted when necessary. I never paid attention to the color rendition in print preview and all prints perfectly matched the colors from the soft proofing. I was surprised when my print came out of the printer and the colors weren't matching the soft proofing colors, but that of the print preview.
I don't understand why Photoshop renders the colors differently in the first place. Please see attached screenshot for the difference in the blue/cyan colors.
I would appreciate if anybody could point me in the right direction in what is causing this difference. I don't care if the print view colors will match the print, but I do care when soft proofing is not working.
Thank you.
Best regards,
D.

Here are some addtional details:
PS 13.1.2
Mac OS X 10.8.4
12 GB Ram
60 GB free disk space
I printed the same photo from two other computers (MacBook and iMac) with different PS versions (CS4 and CS5). The prints turned out identical to the first one which matches the print preview color rendition on my main computer (MacPro) running CS6. Strangely the colors in print preview of CS5 on the iMac renders the colors identical to the soft proofing colors.

Soft proofing in Lightroom

In Aperture (dare I mention it?) there is a "View" setting for soft proofing. You input your printer model and paper and the display changes to the actual colors the printer will output. It comes pretty close. I can't find such a setting in Lightroom.
Canon 20D, Intel iMac 20, HP 7160, monitor frequently calibrated with a Spyder2 Pro, Lightroom V1.
If I import a photo from the camera into Lightroom, the colors on the monitor are quite different from the object shot. If I do NO editing at all, just print, the colors on the print are quite close to those of the subject though a long way from the monitor picture.
This is no help at all if I want to edit the photo in Lightroom...

Yeah...LR lacks soft proofing presently.

Printing, Soft Proofing & Color Management in LR 1.2: Two Questions

Printing, Soft Proofing, and Color Management in LR 1.2: Two Questions
There are 2 common ways to set color management in Adobe CS2:
1. use managed by printer setting or,
2. use managed by Adobe CS2 program.
I want to ask how Color Management for Adobe LR 1.2 differs from that in CS2?
As is well known, Color Management by printer requires accurate printer profiles including specific model printer, types of ink and specific paper. It is clear that this seems to work well for LR 1.2 when using the Printer module.
Now lets consider what happens one tries to use Color Management by Adobe LR 1.2. Again, as is well known, Color Management by printer must be turned off so that only one Color Management system is used. It has been my experience that LR 1.2 cant Color Manage my images correctly. Perhaps someone with more experience can state whether this is true or what I might be doing to invalidate LR 1.2 Color Management.
Specifically, I cant use Soft Proofing to see how my images are changed on my monitor when I try to use the edit functions in LR 1.2. Martin Evening states in his text, The Adobe Photoshop Lightroom Book that it is not possible to display the results of the rendered choices (Perceptual or Relative) on the display monitor. While it is not clear in Evenings text if this applies to LR 1.2, my experience would suggest that it still applies to the 1.2 update even though the publication date of his book preceded this update.
Can someone with specific knowledge of Adobe LR 1.2 confirm that Color Management and Soft Proofing with LR 1.2 hasnt been implemented at the present.
The writer is a retired physicist with experience in laser physics and quantum optics.
Thanks,
Hersch Pilloff

Hersch,
since just like me, you're a physicist (I am just a little further from retirement ;) ) I'll explain a little further. computer screens (whether they are CRT or LCD) are based on emission (or transmission) of three colors of light in specific (but different for every screen) shades of red, green, and blue. This light stimulates the receptors in your eye which are sensitive to certain but different bands of red, green and blue as the display emits, making your brain think it sees a certain color instead of a mix of red green and blue. Printers however, produce color by modifying the reflection of the paper by absorbing light. Their color mixing operates completely differently than displays. When you throw all colors of ink on the paper, you get black (the mixing is said to be subtractive) instead of white as you get in displays (the mixing there is additive). The consequence of this is that in the absence of an infinite number of inks you cannot produce all the colors you can display on a monitor using a printer and vice versa. This can be easily seen if you compare a display's profile to a printer profile in a program such as Colorsync utility (on every mac) or
Gamut vision. Typically printers cannot reproduce a very large region in the blue but most displays on the other hand cannot make saturated yellows and cyans.
Here is a flattened XY diagram of a few color spaces and a typical printer profile to illustrate this. Most displays are close to sRGB, but some expensive ones are close to adobeRGB, making the possible difference between print and screen even worse.
So, when the conversion to the printer's profile is made from your source file (which in Lightroom is in a variant of prophotoRGB), for a lot of colors, the color management routine in the computer software has to make an approximation (the choice of perceptual and relative colorimetric determine what sort of approximation is made). Soft proofing allows you to see the result of this approximation and to correct specific problems with it.

Soft proofing in LR 4

I purchsed and downloaded LR 4 online. In the Develop Modue when I want to soft-proof. I press 'S' to get the soft proof menu but do not have the soft-proof box under the image that I see in ALL the examples when going through tutorials. I tried closing LR and restarting computer, doesn't help.

Hit the T key to toggle showing/hiding the toolbar...

Soft Proofing slows LR5

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