To add new level in Technical tree
Select asset that you want to edit and go to Asset information > Edit structure from process menu
In Edit structure view, click Add new level.
To add an object, drag it from the Asset types list on the right and drop it to the Selected
assets list on the left. Press Ctrl and Shift keys to select multiple object types.
In the pop-up window, add object values and name. Click Save
The system will return automatically to the previous view, where you can continue adding
more objects. After you add all the objects you need, click Save