Does iweb make picture files smaller? how can I do this?

by smaller I mean a smaller file size for optimum website loading?
thanks

Yes. if you have iWeb's preference set to +optimize images upon import+.
Click to view full size
I ran a test with a 2.7 MB jpg file. I optimized it in Photoshop, Save for Web, as a jpg with 40% quality and added to a web page at 300 pixels by 225 pixels. (iWeb's optimize was turned off). After publishing in iWeb and downloading the image it's size was 29 KB.
I then turned on iWeb's optimizing, added the full file, sized at the same pixel dimension which was the default import size for that theme). It's size after publishing and downloading was 33 KB.
I added the same original jpg without iWeb optimizing and it too was only 33 KB after publication. The optimizing didn't have much effect when the file is added and left at the default size that iWeb gives it.
The Photoshop image had a little less contrast and was a little lighted after publishing.
I then used Web Site Maestro to optimize the entire site and upload it. All three image files had been reduced to 12 KB in size.
For photo pages and their slideshows iWeb reduces the files down to 800 x 600 pixels. One set for me started out at about 1.3MB at 3300 pixels x 2550 pixels. The image file used for the slideshow can in around 127 KB online. After running thru Web Site Maestro they were reduced to 66 KB.
Many of my pages have been reduced in size by around 45% with WSM allowing for faster loading.
OT

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