How do I diable auto compression in cs5? I have tried looking for an option in file handling & and also deleted the preferences file with no luck.

Please help!

nataliec76701245 wrote:
Will that apply to saving psd files as jpegs also?
Natalie, JPG is a completely different format to PSD, but whereas PSD is loss-less with or without compression (it just takes longer to save with compression) JPG does affect image quality. But if you use the highest quality settings with JPG, and don't open and save multiple times, you'd be hard pressed to see any problem with JPG images.
As with so many things, Wikipedia has an excellent page on JPEG compression.
JPEG - Wikipedia, the free encyclopedia
I particularly like the sample images towards the end of the article, which demonstrate how the compression works.
JPEG - Wikipedia, the free encyclopedia
Image
Quality
Size (bytes)
Compression ratio
Comment
Highest quality (Q = 100)
83,261
2.6:1
Extremely minor artifacts
High quality (Q = 50)
15,138
15:1
Initial signs of subimage artifacts
Medium quality (Q = 25)
9,553
23:1
Stronger artifacts; loss of high frequency information
Low quality (Q = 10)
4,787
46:1
Severe high frequency loss; artifacts on subimage boundaries ("macroblocking") are obvious
Lowest quality (Q = 1)
1,523
144:1
Extreme loss of color and detail; the leaves are nearly unrecognizable

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