Whenever you need to expand the KTML 4 editable
region in order to manipulate content more efficiently, click the Toggle Full Screen button from the toolbar:
It will enlarge the KTML 4 editable region and make it as big as your screen:
Editable area BEFORE clicking the Toggle
Full Screen button:
Editable area AFTER clicking the Toggle
Full Screen button:
Notice that the new enlarged page is opened on top of the browser window you were working in. After closing the large window (the X button in the top-right corner), you will return to the initial browser window, with the smaller KTML 4 editable region.