I have a custom machine that I designed and built. I typically print using volumetric extrusion by setting filament diameter to 1.128379mm during slicing, then enter actual diameter at print time via LCD panel (Smoothieboard). I have looked through the advanced options in the voxel display and can find no reference to the nozzle size. I have also looked inside the preset files for different filaments/materials and can't find it there.
I am currently using a 0.4mm nozzle, but occasionally change to a 0.25 mm nozzle for very detailed work.