is there a setting for KB+M for rotating the camera view

[Rongway]

It changes depending on whether you are using Legacy or Standard. In Standard, Move/Turn keys turn the camera. In Legacy, Point Camera keys turn the camera and Move/Turn keys are more like strafes. Which is one of the things I think people find most confusing when they switch. This is how the Legacy keybinds and Standard keybinds should be set to maintain key behavior in each mode:

Example Key          Legacy Bind                    Standard Bind

W/↑                  Move Forward                   Move Forward
S/↓                  Move Back / Walk Backwards     Move Back / Walk Backwards
A                    Point Camera to the Left       Move Left / Turn Left
D                    Point Camera to the Right      Move Right / Turn Right
Q/←                  Move Left / Turn Left          Strafe Left
E/→                  Move Right / Turn Right        Strafe Right