Using the Camera or Drawing view is sluggish.
This is often caused by the antialiasing preference being switched on, it should be turned off.
To turn off the OpenGL Full Scene Antialiasing option:
Note: The OpenGL Full Scene Antialiasing option is turned off by default, unless you used it in the previous session. In this case when you uncheck the option a message may appear asking you to restart Toon Boom Studio 6 before the change can take place.
Mac OS X (all)
Toon Boom Studio 6