Add controlpoint to polyline

I have created a polyline with several contropoints.
I can shift these points after the creation, but I am missing a way to ad a point later.

InsertControlPoint
-Jakob

Thank you. That works. But how is it possible that there is no way to come to this point by clicks ?
Are there more commands which are only selectable by knowledge ? How can I find them ?

It’s there - look at the Point Edit toolbar