Two general questions about printing:
1) When printing 4x6, what is an acceptable pixel size? Or is it better to just specify the size of prints? For example, I usually convert the raw file into jpeg and the resulting picture size is about 2700 X 2200 pixels (I have 20D camera). I think 2700 X 2200 pixel size is an overkill for 4x6 prints. I usually print my 4x6 prints from online and it would help me if my file sizes are smaller.
2) When I print my pictures, the pictures come out dark. Thus I tend to change the exposure setting to more positive - thus adding more brightness to my picture. I have tried editing my pictures on both Dell 1905 Flat Panel and Dell 21" CRT monitors - and pictures come out dark. I am thinking maybe I need to calibrate my monitors. I have Canon Pixma 8500 printer and I usually use the Canon printing software. Generally I can compensate for the dark picture by adding the option from the Canon printing software (by changing the "face brightness" option).