Vertical line

Hi im pretty new to rhino. Now when im trying to draw on plane with polyline i cannot switch from “plane” to “vertical” using “shift”. I tried looking in to shortcuts key using options but couldnt figure out how to play with it not knowing commands. Can some one help me use “shift” right ?

Shift acts as a toggle for Ortho. So if ortho is off, holding shift will turn it on while you hold it, and turn it off if ortho is on.

It sounds like what you are after is elevator mode, which you can get with Ctrl. So if you are drawing a line, you can pick your start point, then hold down Ctrl and pick the XY of the second point, you will now have a chance to pick the Z.