I draw a line horiz, select rotate and take its right hand end as the point of rotate.
I rotate it downwards and see I need -175 according to my cursor tips angle (modelling aid>angle)
I return the line to horiz, select rotate and pick right hand end as before, enter -175 and it ends up 180deg to where I had it, correct angle but heading east not west !
I can either extend line or try for +175, do latter and of course thats the wrong angle.
so now out comes the calculator and some maths. I didnt want to be doing that.
Can we have it that tool tips follows the same system as rotate angle ? The idea was to be quick and easy and know what to enter into rotate.
I was hoping that the plan drawer (chap or chappess) had gone for a nice neat figure, but with the angle different to Rhino its not so useful. All songsheets should be the same !