Hello @IronKevin
Thank you for your video , there are two things about this question want to ask you.
First , why doesn't have the Arc option in my IronCAD , my version is 2023 SP1 , it should be the latest version.
Second , through the Arc option , it's indeed possible to annotate total vertical , but the value is not the total vertical , it just extend the annotation line , total value should be 6.65+0.15*2.
I put this model to other 3D CAD software , it's very easy to annotate what I want .