The Axis option in the Camera settings View area lets you show or hide the axis arrows that shows the scene’s orientation.

Scene A. Axis
 Except where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
 Except where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License