If you're asking how to make a screenshot of something in CEP, I know one way to do it with a PC. When you've got what you want on the screen, hit "Alt" + "PrintScrn/SysRq"
This is like hitting "copy"...it saves the screen pic onto your clipboard. Then you just have to go into something like Powerpoint or Photoshop or (maybe Word) and hit "Paste." Then save it as a .jpg file.