[TEC] Adding String (Text) to Menu

Ahoi,
how does one add a string to the menu?
For example adding "Closing tube %d!" for the default key "W":
I am pretty sure to add the string with a fellow number in the MainFolder\Data\Menu\en_menu.txt . But how does one connect it with the command "Cmd311" in MainFolder\data\Cfg\Commands_en.cfg?


Edit 1:Any hints in the right direction are very much appreciated, in case there is no solution availiable.

Edit 2: I didn't use the external view and so I missed the fact that there is an automatet closing after firing a single or salvo eal. But I am still interested in a soloution just for idle curiosity. What brings me to a new question.
But for serch-related issues I will open a new thread.

Final Edit: It's already done.