When using the idea, often encounter code is too long, wrote the code before half time need to go rummaging, very long time to Zhao. This time will be used split-screen.
idea of split-screen operation is very simple. File-> Settings, Search the keymap (note that all lowercase), search Split Vertically (horizontal split screen) or Split Horizontally (vertical split screen).
A horizontal sub-screen, for example, as follows, step 1 to get.
