Struggling to snap to corners

Need help? We are here.
1

I’m having a hard time snapping to corners in shaper. I’m used to rhino, which seems to have pretty powerful snap to elements on your geometry.

In the video I’m sharing, I’m trying to snap a line to an extruded plane, to sketch a vertical line up from it. Any advice? Thanks! noob here.

Video!!

2

To snap to object geometry your sketch plane has to intersect with that object. Another way is projecting object geometry to the sketch and snap to that projection.