A method comprising: causing definition of a display window in a displayed virtual scene; displaying window content inside the display window, in the displayed virtual scene; in dependence upon a first user action, causing a first change in the window content displayed inside the display window to first window content different to the window content, without changing the display window; and in dependence upon a second user action causing a second change in the window content displayed in the display window to second window content, different to the first window content and the window content, and causing a variation in the display window to become a modified display window different to the display window.