You can show the analysis bar, member, and analysis node numbers of the active analysis model in model views.
On the Analysis & design tab, click A&D models.
In the Analysis & Design Models dialog box, select an analysis model.
On the Analysis & design tab on the ribbon:
Alternatively, you can use the following advanced options in to define which numbers are shown:
Some analysis applications work on analysis members whereas others work on analysis bars. This also affects how analysis models are shown in Tekla Structures model views. Either member numbers or bar numbers are shown.