Answer:
The offset point of the section is used as a reference point to place the section in the cross-section. This point is highlighted in red in the section graphic of the "Set Section" dialog box (Image 01). Coordinates y and z refer to the centroid of the section.
Another reference point can be selected by clicking one of the red nodes, or turquoise snap points can be defined. At this point, the section is "glued" to the pointer before it is finally set with a mouse click.
A clever choice of section offset point makes it easier to set the section on elements. This is also shown in the video. Please note that the sections shown in the video are not yet connected to each other. The way these can be connected is shown in FAQ 002389.
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