Abstract: A method and system for grouping and manipulating windows in a window system is provided. In a preferred embodiment, a plurality of displayed windows are grouped into a project group. A project group has associated information regarding which windows belong to the project group, an associated project group appearance for differentiating the windows in the project group from other windows, and a set of project group commands for operating upon the project group. A window is designated as a project group folder, this window containing indicators to the other windows belonging to the project group. For each window belonging to the project group, project group commands are added to menus of the windows belonging to the project group. Later, when a window is activated and a project group command selected for operating upon the project group, certain behaviors occur.