Toggles the horizontal window split.
If the current window is split vertically or not split at all, this command will split the current window into horizontal panes, and will fix the split position at the center of the window immediately. If the current window is already split horizontally, this command will remove the horizontal split from the current window.
•Default Menu: None
•All Commands: Window > Split > Toggle Horizontal Split
•Status Bar: None
•Default Shortcut Key: CTRL + -