How to Put a Window into a Desktop Divider Tile
Begin to drag a window by its title bar.
The grid appears indicating the current tile layout. Also, there is a frame indicating the current tile (i.e. that one which the mouse pointer is in).
Drag the window into the required tile so that the mouse pointer touches the frame (any side) in that tile.
The frame turns into a solid rectangle showing you the proposed size of the window.
Release the left mouse button to put the window into the current tile.
Left-click this button to put the window into the nearest tile. You can make several clicks in a row to cycle through tiles on the current monitor.
Right-click the window's title bar to open the context menu.
Click to the Put into... item to open the Put into tile selector window.
Left-click the desired tile to select.
Via special hotkeys