Turn editing on
choose any existing resource or activity and click on the Edit () button and choose Edit Settings from the drop-down menu.
In the Content block of the Editor window. Press the Toggle full screen mode button () to maximise the size of the content editor window.
Toggling full-screen mode causes the content window to fill the entire screen. During this mode, only the content block that you are currently editing will be visible.
You can close the full screen view by pressing the Toggle full screen mode () again.