Mouse

Do this	What happens
Drag the edge two tiles share	Every tile on that line resizes, from 5 % to 95 %. If an app’s minimum or maximum size stops the drag, a message names it, for example “Spark Desktop can’t get shorter than 700”.
Drag a window by its title bar onto another tile	The two windows swap places.
Hold ⌥ (Option) at the start or end of a title-bar drag	The window floats where you drop it instead of swapping. You can change the key with drag_float_modifier.
Drop a window at the screen’s outer left or right edge	It moves to the neighbouring workspace. Next to another display, it moves to that display.
Drag a window onto another display	It joins that display’s workspace, in the tile under the pointer.
Open a new window	It takes the half of the focused tile your pointer is in. With force_split set to 2 it always takes the right or bottom half.
Hold ⌃⌥ (Control-Option) and scroll	Scroll down shows this workspace’s overflow row; scroll up hides it. Other scrolling reaches your apps untouched.
Click the strip at the bottom of the screen	Shows the overflow row. ⌘Tab to one of its windows does the same.

The focus border hides while you drag or resize a window by hand. It comes back once the window settles.

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