When you select demands in a requester chest, you get all available quantities displayed in the selection window, see screenshot:
In both cases, I have to enter "L" first, search for the desired machine or module, note how many I have available, decide which quality to use and then go back and insert / build them.
It would be very convenient to have the available numbers displayed in the building menu or the module insertion window. Of course only the ones available in the logistic network I want to build in can be displayed.
However when building something while placing down a ghost, you do not:
Same goes for inserting modules into machines:
Interface - Show available quality in building menu
Moderator: ickputzdirwech