I have defined a section by entering a polygon. The context menu allows me to move and delete points of the polygon. However, the functions “Open”, “Insert points” and “Snap point” are inactive. Ho...

Select the outline of the (partial) cross-section and choose “Edit geometry” from the context menu. The cross-section is now displayed as you originally entered it, i.e. it can consist of one or several drawing objects (lines, rectangles, polygons, circles), which can now be selected and modified as desired.

Note: A cross section can be constructed in two ways during introduction:

1. From lines and parts of polygons, which together look like a closed polygon and do not overlap anywhere.
2. From one or several closed polygons (also rectangles), which can touch each other and intersect.