Answer:
It depends on the initial situation. Currently, lines and members can only be rejoined or combined if no other elements are connected to the division nodes. This is illustrated in the attached image.Select the intermediate nodes to merge a member that has been divided several times. Then, click the function Delete Nodes → Merge Linked Lines/Members in the shortcut menu.
This function is not available for the lower part of the structure: The merging would delete the definition node of the connected beam.
