If you want to show people what you are seeing on your screen, take a screenshot of it as described below
If you use Windows:
1. Press the Print Screen key on your keyboard.
2. Open an image editing program, such as Microsoft Paint. If you dont know where that is, click Start... Run... and type MSPAINT and then click OK.
3. Then press Control-V to paste the screenshot into Paint
4. Then select File... Save... select PNG as the Filetype if you want it to look better, and type the name for your screenshot.
If you have a Mac: (i pity you)
Use Apple (Command) Key +Shift+3
To learn more about screenshots, click here