[Why file size increases after Save]

Thanks for the explanations David and Rick. Makes sense to me now. Thanks for your suggestion too Myrddin, I might try a PNG compressor to keep the file size down.

Great program, great forum!

[Why file size increases after Save]

The file definitely goes from 313 KB to 2,048 KB. No typo. I don't know exactly what metadata is, but that much of an increase after doing nothing but opening the file and immediately saving it can't possibly be caused by additional metadata.

[Why file size increases after Save]

Saving as a PNG also would work for me. Yes it is a little smaller than saving as a TIF but the PNG format is still 5 times larger than the original as opposed to 6 times larger when saved as a TIF. I'm still looking for the cause. The resolution doesn't appear to be changing.

I just tried the same thing with Microsoft Paint and when I saved the file as the same format (TIF), it went from 314 KB to 478 KB. Now I can live with that small increase.

[Why file size increases after Save]

I didn't add anything to the image. All I did was use the eraser and erased a few pixels. Then I just clicked on "File", and then "Save". The image was saved as a TIF, just like the original, but increased in size as I described in my first post.

I also tried this: I opened a TIF image, did NOTHING to it, and saved it. The same thing happened...the file size increased from 300 KB to 2048 KB.

I'm confused.

[Why file size increases after Save]

Paint Newbie here. Great product, and I'm glad I stumbled across it.

I used Paint to edit a .tif image that was originally about 300 KB in size. All I did was erase a few objects. When I saved the file, the file size jumped from 300 KB up to 2048 KB!!! Can someone tell my why? And is there a setting to keep it from doing that?

Thanks