An application window divider control is shared by a first application window and a second application window in a user interface. Based on a received directional instruction that moves the application window divider control along an axis of the user interface, placement of the first application window and the second application window may be positioned across a range of consistently spaced points along an axis of the user interface. Placement adjustment can also impact other application windows in the user interface. The application window divider control may also snap to provide “magnetic” points along the axis when certain conditions are satisfied.