[Las Vegas Ron]

It's not optimized. It's saved in a different format.

Well I guess you just let the cat out of the bag DUmmie.

Taking a tiff and converting it to a .jpg is optimizing the file.

From wiki;

The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image >

LOL, you call us slow, I call you stupid.

[EnderWiggins]

"Taking a tiff and converting it to a .jpg is optimizing the file."

No... it is saving the file in a different format. Because jpegs are lossy file formats, they are certainly a whole lot smaller. But that's not what optimization actually means.