In version 2022 R2 the source code has the following for a button on the grid section of the Sales Orders screen, with the command “AddInvBySite”.

And here’s the source code, easily findable:

I’m upgrading to 2024 R1, and I see the same button (“Add Items”) – with a different command, “ShowItems”. The problem is, I can’t find this action / command anywhere in the source code / BLC for that page…

Any idea where I can find that ‘ShowItems’ command?