How does the EditPlus editor split the editing window into two parts?

When writing code, sometimes write CSS and HTML tags, drag the scroll bar is inconvenient. Here are some tips for using

1, open the EditPlus Editor, click the shortcut can be

2, came to the editing interface, showing the entire page

3, we will move the mouse to the figure in the arrow indicator position, know that the small arrows into the top and bottom are the appearance of the arrow

4, then click the mouse to drag down

5, so the editing area becomes the top and bottom two parts of the appearance of

6, let the window again become the same as the previous step, click the line of demarcation, turn back

7, put to the original position, let go, and then back to the original position