Pressing down on the middle button may be used to query the data that underly the mouse. As a result, a pop-up window appears, giving the user information about the data records, including attribute names and values. In the event that there is too much information to fit in a pop-up window, the information is displayed textually on the user's terminal. Where to Place Graphics Views and windows are the means through which the user decides to place graphics. First, views can be removed from windows to reduce clutter, or moved to other windows for side by side comparison with other views.
Windows are responsible for arranging views inside their boundaries.
Different placement strategies may be implemented. In addition, DEVise relies on the window manager of particular implementations for moving a window to a different locations on the display, for changing the size of a window, or for turning the window into an icon. We now describe each one in turn, beginning with the Session menu. Recall that the state of each visual query is a session . The user selects the new input data when session is restored.