The menu displayed in the Geometer's Sketchpad is as shown in the figure below, and all functions are as follows. By comparing with other menus, we can know which options are missing in the display menu. In fact, each menu has its specific functions, and the power of these functions can only be realized when drawing. If you are a beginner, I suggest you follow the tutorial, which will save you a lot of detours. The Geometer's Sketchpad official website (website below) has many similar tutorials for beginners, and they are free. I suggest you study, I hope it will help you.