In computing, a dynamic window manager is a tiling window manager where windows are tiled based on preset layouts between which the user can switch. Layouts typically have a main area and a secondary area. The main area usually shows one window, but one can also change the number of windows in this area. Its purpose is to reserve more space for the more important window(s). The secondary area shows the other windows.

Tiling window managers that don't use layouts are called manual tiling window managers. They let the user decide where windows should be placed.