Selecting many points of the curve at once

I have a problem with selecting multiple points at once. Let’s say I have a trapeze and I want to mark the first two points on his side. I can not do that. He only marks me one point. I tried with the shift button pressed but it does not work.

The functionality of the selection of multiple points at once is coming soon. It will be available starting from version 4.1 and the upcoming alpha.