[chimerax-users] Joining models together in ChimeraX

Hi all, I am trying to join together two protein structures (in my case, one protein without the N-terminal domain combined with the NTD of a related protein). I came across a tutorial on how to do this in Chimera ( https://2019.igem.org/wiki/images/f/f3/T--UNSW_Australia--Daniel_Winter_Chim...), but from what I can tell ChimeraX's Build Structure tool doesn't have the options required to do this. Is there a way to join together two models in ChimeraX? Thanks, Chris