Straight line with stylus

[BryceGrizzen]

I need some help with drawing a straight line with a stylus using shift.  Using a mouse it works just fine by clicking the starting point, holding shift and clicking the termination point.  However with a stylus after clicking and holding shift I can see a preview but upon releasing shift there is no line.
I can't even find a reference to this by googling so I assume I'm doing something wrong.
Thanks in advance.