By right-clicking on 3D view open the context menu.
To create "published elements" in axes, points, etc., select Select sketch.
->The Select sketch window opens.
If, for example, you would like to create an axis as a "published element", select the corresponding sketch (in this example "Axis: Sketch 2").
Confirm with OK.
->The processing window shows up.
Further courses of action all follow the directions above.
Result
Published elements
