===============
Viewer Controls
===============

The GUI responds to the following input keys:

::

   'h'                     : Toggle help menu
   'q'                     : Quit the simulation
   'b'                     : (Break) Pauses and unpauses the simulation.
   'space bar'             : When paused, take a single simulation step.
   'a'                     : Rotate through the camera views
   'A'                     : Rotate to a free movement camera view with pre-defined orientation
   'right/left arrows'     : Change the aircraft to follow
   '['                     : Decrease simulation warp speed
   ']'                     : Increase simulation warp speed
   '+'                     : Increase visual scale of all entities
   '-'                     : Decrease visual scale of all entities
   'N'                     : Increase visual scale of entity numeric labels
   'n'                     : Decrease visual scale of entity numeric labels
   'r'                     : Reset visual scale and reset camera position
   'z'                     : Zoom out from entity
   'Z'                     : Zoom in to entity (z+shift)
   'w'                     : Display wireframe
   's'                     : Display solids (vs. wireframe)
   'CTRL + Left Click'     : Rotate world
   'SHIFT + Left Click'    : Translate camera through world

.. Note::
   If the terrain data is not fully displayed or if the entities do not appear,
   clicking on the SCRIMMAGE GUI will correct the problem. This is a small bug
   in VTK.