I want to change my main program from Cinema4D to Houdini (before it`s not too late). Houdini is a wonderful program. But there is one thing that annoying me - spacebar navigation method.
May I change somehow shortcuts from spacebar and various mouse buttons to figures and left mouse button (1+lmb=movement up-down-left-right; 2 - zoom in-out; 3 - rotation)?

A way to reverse the orbit for viewport navigation like in Cinema 4D would be great.

it's best to just learn Houdini's way Just like driving on the opposite side of a road in another country or speaking another language. It will just ‘click’ with lots of repetitive practice.