NoFillCorrected
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Start with open polyline with 3 points
Click on “Close Object”
That gives a polygon with 3 points.
The button is shown as pressed now.
I don’t know why it changes its name.
Press that button again.
You have the previous state of the button.
The polygon is opened. An additional point is added as end point, which has the same position as the start point.
That is reflected in the status bar.