<select item> "dimension as 20 millimeters and make reference" <select next item> "rotate 90 degrees and scale to radius 100 millimeters" sounds to me that it

<select item> "dimension as 20 millimeters and make reference" <select next item> "rotate 90 degrees and scale to radius 100 millimeters" sounds to me that it would make CAD far less dependant on context switches between mouse/puck/pen and keyboard than it is.