All images can be saved in a number of formats. GIFs tend to be smaller than JPGs but sacrifice some quality. Resizing an Image Open the file. You have the option of changing pixels or inches.
Pixels are a bit easier.
320x240 is a moderately sized image. 640x320 is large for a file size. Creating Backgrounds Resize the image to 800x600. Change the brightness by clicking C olors, A djust. By sliding the brightness and contrast, you can make the image lighter.