Please follow these steps inside a recent version of Blender (2.83 and above)
Go to 'Edit>Preferences>Keymap
Press 'Import' and choose 'Anatomy-shortcuts.py'
Go to 'Edit>Preferences>Add-ons'
Check the '3D View: Stored Views' checkbox
Go to Edit>Preferences>Navigation
in 'Orbit and Pan', Check 'Orbit Around Selection'
in 'Zoom', check 'Zoom to Mouse Position'
Go to Edit>Preferences>System
and choose 'CUDA' if you have it, and check both the processor and the Graphic Card
Then close the Preferences window
In order to get a smooth viewport display, without the noisy shadows and the flickering effect when orbiting the view:
-Go to the 'Properties' window
-in the 'Render properties' panel>'Sampling'>'Viewport':
Reduce the number of Samplings to zero, and check the 'Viewport denoising' checkbox
Then open 'z-anatomy.blend' and allow scripts.
The 'z-anatomy' script in integrated and registered and should be automatically activated.
This script maintains the lights on when isolating structures with 'Shift+H'.
If, for any reason, it does not, go to Preferences>Add-ons>Install, find the 'z-anatomy.py' file, and check the checkbox.