file format

> What is the best file format to save your pictures in. Is .tiff or .png the
> best? I guess 600 lines of resolution per inch is the best too isn't it?
> Thanks for the help.

What are you using your images for? .tif or .bmp are good because they're loss-less. .png or .tga should be used if you need to
keep the alpha channels. Of course, Photoshop native .psd files keep all the data, including layers, effects, and other stuff like
that. If you're putting them on the web, you should use a compressed format like .jpg or .gif. (But keep the originals in case you
need to edit them.)

As for resolution, it all depends. 600 dpi is good for high-quality prints, though for most purposes, 300 dpi is sufficient. If
it's never going to be printed and only displayed on the screen, you don't need anything better than 72 dpi. (Actually, dpi is
pretty much irrelevant for graphics that aren't being printed. Pixel-dimension is all that matters in this case.)