Pedaler - 2010-07-20

Is there a setting that will help reduce the number of colors in order to make a smaller file, or a smaller email message when the copied image is pasted into a message? Since most monitors are set up for thousands or millions of colors, the copied image can be large (in kb). In the past, I have copied from Greenshot, then pasted into another application (Irfanview), then reduced the colors to 256 for a nicely small image. Thanks in advance for any suggestions!