Split view

This command splits a view horizontally or vertically into two.

Use:

Click the icon or select the Visualization > Views > Split view... command from the drop-down menu.

A dashed line appears dynamically. Click the area where you wish to make the separation.

By moving the mouse cursor on the vertical boundaries of the view, the dashed line is horizontal. By moving the mouse cursor on the horizontal boundaries of the view, the dashed line is vertical.
If your document is split into two views, only the current view has a black framing around it
To delete the split view, use the Delete view command.