[jprippin]

I followed the thread that Mark started about 'DPI help ' and by the end I felt like it was soaking in.
Then I made the mistake of thinking about it more and I got lost again. I have a three fold question now.
1.) I have resized an image to match another image (3291x2592) , and set them to the same ppi (240) , saved them at the same 'quality (Max 12) and the file sizes are significantly different i..e. 3.87 and 3.05 MB... why?
2.) Then in the process I went back to one of the files to verify the 'quality' level and without changing any values I saved a copy of of same file and that new file is 4.15 MG... why?
Now I have one more...
3.) So the next logical question is when you select an 'image quality' value, what is different since the size and ppi are the same ?
Just putting this in text this is giving me a pounding headache..lol
Working in Photoshop CS3 V10.0.1