You can write the question in a free form
Firts, you need to open in your computer anything you want to show on the remote telepresence robot screen. In video below, we are opening the jpeg file with electrical circuit image.
Next, you need to connect to the robot and press the screw icon ("Settings") and "Screen Sharing" icon, see video below. After that you will see window that allow you to choose the source of image or video to be showed on the remote screen. You can close screen sharing pressing the button "Stop sharing in the bottom of the computer screen"