Abstract: A method of a display apparatus managing a plurality of virtual workspaces of including generating a first data structure as a reference of at least a window; generating a second data structure as a reference of windows respectively linked to the virtual workspaces on the basis of the first data structure; generating a third data structure as a reference of a shared window linked to all of the virtual workspaces; selecting one of the plurality of virtual workspaces; and displaying the shared window and/or the window linked to the selected virtual workspace on the basis of the first data structure, the second data structure, and the third data structure.