Now is the time to resize your image. Your aim here is to get the image file size as small as possible, while retaining enough quality to make the image proper for computer viewing. Another consideration is protecting your image from improper use. The smaller the image, the less enticing it is for picture thieves.
At the top of your program, click "Image," then float your mouse over "Resize" and click on "Image Size." A new box will pop up.