Saving files and file size

[drawdE]

I've noticed that a file saved that is only slightly altered, with text perhaps, is nearly 3 times the size of the original file. At 100%, is the program literally saving more data in the picture? How can it save more data than was originally present? Why the change in file size? Thanks

[Sarkut]

You are referring to JPEG files?

If so, the file may have been saved originally at 70% to 80%.

When you edit it, then save at 100%, it will result in a bigger file size.

Edited July 6, 2010 by Sarkut