A good way to change the size of your pics is Microsoft Paint in Windows...sorry, can't recommend a good one for Mac. :-[ I usually take photos with my phone, email them to myself, save them on the computer, then edit. First thing is to change the size in Paint to less than 500k. Next, I'll crop and change the lighting effects (if needed) in Picassa. Picassa is a free photo editing program that I've had great success with for many years.