It can take just a bit to get your head wrapped around it since it is kind of a "go between" for Pro Tools (or any DAW) so that you can monitor direct OR DAW monitor.
The manuals for the 8 Pre and Focusrite Control do a decent job explaining, but sometimes more is desired.
Look at the link for tutorials from Focusrite below. Hope that helps ya.
I love my Clarett 8Pre X.
https://support.focusrite.com/hc/en-...usrite-Control