[chimerax-users] sequence identity command

Hai, I want to use the sequence identity command in ChimeraX but in the log said "Missing or invalid "src1" argument: Expected alignment-id or [alignment-id]:sequence-name-or-number". The input I gave is "sequence identity alignment-1" after open the tools>sequence>show sequence viewer and then select model e.g. #1/a and it show the ID as [ID: 1] but i got error. How to solve this problem? Hope ChimeraX teams can help. Thank you!