LENS

##
LENS

            [GTVL\]LENS

        Under X, call the lens on the active window. The  flow  of  commands  is
        suspended until the lens is closed.

        The usual way to call the lens is using the middle-click of the mouse on
        the plot. However, this command is useful to give a detailed look to  an
        intermediate plot during a procedure, since it acts like a PAUSE.

        When opened, the lens is controled by the following actions:
          - Mouse wheel: reduce or enlarge the zooming factor,
          - Left-click or CTRL+wheel: reduce the lens area,
          - Right-click or CTRL+wheel: enlarge the lens area,
          - Middle-click: close the lens