ZBrushCentral

Outside and Inside Views

Need help with the following.
In around frame 0.31 of this video clip the view is switched from the whole object to the outside and inside views.
How can I obtain these 2 views and carry on sculpting the inside without affecting the outside and vise versa.
Many thanks for your help.

https://www.youtube.com/watch?v=zkeNNWE0N_A