Some keystrokes not working

I am learning more about my iMac and have found a nifty shortcut to quick hide/unhide dock. Command - Option. But id doesn't work for me. Why? Do I have to set something somewhere? This happens with other keystrokes as well.
Any help is appreciated,
Sarah

The default +keyboard shortcut+ for hide/show Dock is Command-Option-D, not Command-Option.
The pre-assigned keyboard shortcuts are turned ON and OFF in System Preferences +Keyboard & Mouse+ pane +Keyboard Shortcuts+ tab. Here, you can also create new keyboard shortcuts.

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Some PDFs not working in Preview. I installed adobe reader and then deleted it because the software was aweful and PDFs have been haveing issues ever since. I can open up PDFs created on my Mac in preview just fine...
But when I try and open a PDF created on a windows computer it says:
"Please wait...
If this message is not eventually replaced by the proper contents of the document, your PDF viewer may not be able to display this type of document.
You can upgrade to the latest version of Adobe Reader for Windows®, Mac, or Linux® by visiting http://www.adobe.com/products/acrobat/readstep2.html.
For more assistance with Adobe Reader visit http://www.adobe.com/support/products/ acrreader.html.
Windows is either a registered trademark or a trademark of Microsoft Corporation in the United States and/or other countries. Mac is a trademark of Apple Inc., registered in the United States and other countries. Linux is the registered trademark of Linus Torvalds in the U.S. and other countries. "
I am not sure why where the PDF was created would make a difference but couldnt help but notice that was the difference between the PDF files that work and the ones that give that message. I can view the PDFs on a windows computer just fine and never had issues untill adobe, it seems to have messed up PDFs on my Mac and I am so frustrated with them. I have searched my computer for any remaining adobe files, deleted them and restarted my computer but I am still getting this message.

Uninstall Adobe Reader's plug-in.
Remove the following two files from /Library/Internet Plug-Ins/:
AdobePDFViewer.plugin
AdobePDFViewerNPAPI.plugin
Open Safari Preferences > Extensions. Do you see AdobePDFViewer? If yes. disable.
Log out/in and test.
Another option is to download and install this plugin. Schubert|it PDF Browser Plugin . PDF Browser Plugin 2 is free for not-for-profit activities if used at home or at educational institutions.
http://www.schubert-it.com/pluginpdf/

Keyboard: some keys not working

Some keys not working. Need help/suggestions. Not great with computers so PLEASE give details/steps re: how to do what you suggest - thanks!
Details: intel based iMac running snow leopard 10.6.8. Apple wireless/bluetooth keyboard (came with the iMac).
Some keys suddenly stopped working: space, tab, capLock, option key to the right of space bar (one on the left works), down arrow
The problem happens in various programs (safari, pages, etc)
The keyboard is fine on another iMac
A different keyboard is fine on this/the involved iMac
(nutshell: keyboard works fine - computer works fine, unless they're together)
Here's what's been tried/checked:
-checked the settings for universal access ("mouse keys" are off) and checked for any bluetooth keyboard shortcuts.
-in system preferences "speech" is not set for "speak selected text when the key is pressed" - this is not checked/selected
-tried creating a new user but had the same issue so it's computer-wide rather than just a user account
-removed the keyboard and reconnected (using the +/- signs and "disconnect" and putting in a new code of numbers to pair keyboard)
-language/text is set for english
-did the keyboard viewer and the keys in question did NOT highlight when pressed (but don't forget the entire keyboard is fine on a different computer so thekeys aren't the issue)
-"slow keys" is turned off re: keyboard in system preferences.
Any help is welcomed. It's frustrating knowing the keyboard works, just not with this computer. Please help. Many thanks!

yes - not sure how this works...if you can see my original post there are a lot of details in there. If you can't...
nutshell: the keyboard works on a different iMac
             a different keyboard works on this/the involved iMac
             I tried to create a different user and the keyboard still does not work so it is computer-wide
             I also removed the keyboard from the computer (using the +/- symbols and disconnecting and then repairing it. The problem remained
Thanks for any help. It's crazy that the keyboard is fine and the computer is fine but together, there's the problem.
Thank you!!!

I have downloaded a trial version of Dreamweaver CS6 to my MacBook. Why do some features not work?

I have downloaded a trial version of Dreamweaver CS6 to my MacBook. Why do some features not work? I have OSX 10.6.8. I am using this trial version for a class I am taking on coding webpages using Dreamweaver. there are features I am using in class that will not open up or appear as options when I use the trial version. Are certain features locked out until I buy a copy or download a purchased copy?

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Please do a SMC reset, if that does not work the first time please do it 2-3 more times. You can find instructions at:
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HT1977 I bought apps. My kid delet that after few weeks. Then I have downloaded to same ipad. But some functions not working.

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some apps not working in osx

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Some Tabs Not Working in System Preferences

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Found that all is restored when logged into the root account and also into a Maintainence admin account. I also ascertained that in my faulty account, after taking out the login items plist and starting with no login items, the fault was still there. Similarly booting into safe mode did not restore the faulty tabs. I ran font book and deleted all questionable fonts and moved all the user fonts to the /library/fonts folder. After each action I restarted rather than logging out. I have tried deleting the systemuiserver.plist and removing the relevant network plists from the user/library/preferences folder. I have also removed the com.appl.network.eapoiclient.plist and com.apple.systempreferences.plist. I have also made invisible files visible and gone through the whole system folder/library folder and ~/library folder and deleted old preferences and obsolete files back to 2004 with the result that my system now loads very much quicker, which is an obvious bonus. However, the problem still remains and is obviously something to do with the main user account. If I go into root or my maintainence account, I can change or edit some settings which "stick" when I log back into my main account. I have carried out the mail and iBook update in the mean time which has not changed anything.
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<Email Edited By Host>

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http://forums.adobe.com/thread/375776?tstart=0
You either have to physically delete (or rename) the preference files or, if using the Alt, Ctrl, and Shift method, be sure that you get a confirmation dialog.
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I have almost the same problem,
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Hi RMTuck,
I'm sorry to hear you are having these issues with your iPad after a recent update. If you continue to have issues sending or receiving iMessages, you may find the troubleshooting steps outlined in the following article helpful:
If you can't send or receive messages on your iPhone, iPad, or iPod touch - Apple Support
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btw, on this forum, why is that that you enter a title to ask question, then you have to enter that title again.

Hi,
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Uninstall Adobe Reader's plug-in.
Remove the following two files from /Library/Internet Plug-Ins/:
AdobePDFViewer.plugin
AdobePDFViewerNPAPI.plugin
Open Safari Preferences > Extensions. Do you see AdobePDFViewer? If yes. disable.
Log out/in and test.
Another option is to download and install this plugin. Schubert|it PDF Browser Plugin . PDF Browser Plugin 2 is free for not-for-profit activities if used at home or at educational institutions.
http://www.schubert-it.com/pluginpdf/

Some keystrokes not working

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