Draw Rectangle mode

This mode lets you draw various rectangle shapes.
Menu path: Mode -> Draw Rectangle.
Action category: Drawing.
Default key: Ctrl-Shift-D.
Additional actions: Increase Subdivision Level, Decrease Subdivision Level, Increase Corners Bevel, Decrease Corners Bevel.

You can activate this mode by pressing Ctrl-Shift-D (default key).
You can use the side panel or "Increase/Decrease Subdivision Level" and "Increase/Decrease Corners Bevel" actions to change corner bevel amount and detail level:

Negative bevel values are also supported:

When using "Increase/Decrease Corners Bevel" actions, the bevel increment is based on the current grid size.