Glyphs 4: Variable Stroke: Pen Point - where are the handles?

Glyphs
1

I can adjust the width of the Pen Point numerically in the width box but I don’t see any handles for controlling the width of the Pen Point. It would be really useful if the stroke width/height could be controlled using handles; this feature appears to be indicated in the Manual but I don’t see it implemented in the software.

2

There are no handles, yet. We will add them in a future version.