Re: png vs gif

.png is not supported on most browsers at this time, although "they" keep 
saying it will be the format of the future .jpgs. So, it wouldn't be a good 
idea to use it unless you know the only viewers you want to see it can get 
the .png format.

If your software allows you to create .gifs then they are licensed for the 
use of the format. You can use them.

When creating .jpgs there is compression involved. Even if you tell it to 
leave it at 100% (compression not dimensions), my understanding is there is 
still some compression happening. You have control over how much you want. 

Sometimes you can't tell the difference on a computer screen between a jpeg 
that has been compressed to 80% or 50% or 30%. Take your image and compress 
it at different levels and look at them on your computer. You can even upload 
them to a Web page if you want to look at them online (may look a bit 
different). In Photoshop 5.5, you can compare different compressions in the 
same dialog box. I don't know what program gimp is so I couldn't tell you how 
it would work there. Do you have Photoshop?

Just in case you don't know, the rule of thumb is large blocks of color 
and/or type should be a .gif and photos should be a .jpg. There are 
exceptions at times.
-Janet 

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