When I download images from my Canon S50, they are in jpeg. I save the jpegs on\na CD to prevent future degradation. I then open selected ones, size them as\ntiff at 11x17" at 240 res on my hard drive. I make necessary adjustments and\nresize to smaller dimensions as needed. Sometimes I resize to 6x8 or smaller\nand save them on my hard drive as jpegs at 72 res for emailing. When I do this\nand mail them (lately to myself as a test ) they will not open, and I get an\nerror message asking whethetr I want to search the web for a program to open\nthem or designate the program.When I designate Photoshop CS (or 7.0 that I\nstill have) they open. How can I save tiffs as jpegs, downsize, and have them\nopen readily in emails?