13:19:08lokeWhen an output record is created, it can ask the underlying medium about specifics
13:19:28lokeFor example, when a draw-text-output-record is created, it asks the medium what the precise measurement is
13:26:57lokeBasically, when the output record is created, it calls TEXT-BOUNDING-RECTANGLE* on the medium to determine the dimensions of the output record. Each backend has its own implementation of this.