Easiest way is using “add part to assembly” or sub-assembly. But this sometime create an issue, especially if you want to export out this data to other software. Solution: use “added material” instead. Steps: 1.With “Select Reinforcing Bar” Mode & Transparent “Ctrl+2” mode; select all rebar. Right click & click on “Detach from Part”.
Numbering is unique ID for each panel or assembly in TEKLA modelling. Sometimes the number messed up and you want to re-arranged it manually (because the automatic setting just won’t pick up the arrangement that you want). Sometimes you need to change the number in order to clone drawing from previous panel with different prefix