How do I finish drawing a 45° polygon line in Calc?

When drawing a line with the 45° polygon tool; How do I finish that line?
Every button I tried either just deletes what I drew, or does nothing; Like pressing the right mouse button, enter, or escape.

Here is a screenshot of the problem. Note that the cursor was not captured; It is at the end of the 45° polygon line.
Also note that the drawing toolbar at the bottom, has to be enabled first.

Double Click.

I guess simple problems require simple solutions.
Thank you very much!

I just double click to finish the line. Worked just fine.
Thanks to Opaque for telling me in the comments.