I've just purchased an XPS 13 9350, which I initially like very much.  However, it has been some years since I had my last laptop and I am stale on a lot of features.  My problem is that I cant' find any user manual, or similar, which shows me what gestures to use on the touchbar, the working of the function keys, integrating a non-Microsoft mouse, etc., etc.  The only manual I've found so far is how to take the machine apart and put it back together!  Google seems helpless, too.  Any suggestions?