Every elevator has instructions for using it. This sign decided to explain the whole process.
If you're writing instructions, at least make them clear: Press the button for your floor
Update: Turns out there's already text in the instructions for exactly this action
Could have at least quoted it.
Update:I get it now. Everything is written correctly. But this isn't for people—it's for hospital staff. There's another freight elevator nearby, and being on a certain floor means you... call that elevator to then call another one... ???