Pictures are an efficient thing to use in your program. However, I would not use them too much. People have drawings that they store in pictures, and if you overwrite them, then they'll get mad at you. People may have archived pictures, making your program return an error "Error: Unarchived". So why use them at all? Maybe you want your program to be able to export a picture. Or sometimes it's essential to use a picture to save many lines of code. To store a picture, first you have to draw it on the graph screen. Once you've done that, use the token "StorePic" from the [2nd]{Draw}{Rightarrow}{Rightarrow} menu. It should be the first one. GDB's are Graph Data Bases, and they store all the Y= variables into one variable, which can be recalled later. You want a Pic. Type in the name of the picture that you want. So it will look like this :StorePic 5. To recall a picture, use the RecallPic funtion in the same menu. That's all there is to it!