Dimensioning to edges of a slot in techdraw

To add a counterbore I can create an offset of the through hole and specify the counterbore depth When using Hole Callout to dimension a slot

What machining process is specified for the slot? Are the dimension values placed on the drawing with the aligned system or the unidirectional

slot car track pieces which shows me how to do a correct dimensioning in 3 different ways for a single slot But I just don't know how to call out for multiple slots

slot pramatic numerical input on sketch entity creation will create dimension, sketch slot tool with slot axis