The {{Button|[[File:Sketcher ToggleDrivingConstraint.svg|16px]] [[Sketcher_ToggleDrivingConstraint|Toggledriving constraint]]}} tool turns dimensional constraints(Lock,Horizontal/Verticaldistance,Length, Radius and Angle) into reference mode, andback.The icons in the toolbar turn blue, and rather than dimensional constraints,referencedimensionsare created. Reference dimensions do not constrain the sketch. It can be useful to create reference dimensions in a sketch as a way to check on measurements; when given a name, they can also be used to drive constraints in another sketch through [[Expressions|expressions]].
The [[Image:Sketcher ToggleDrivingConstraint.svg|24px]] [[Sketcher_ToggleDrivingConstraint|Sketcher ToggleDrivingConstraint]] tool either toggles the [[Sketcher_Workbench#Sketcher_CompDimensionTools|dimensional constraint creation tools]] between driving and reference mode, or toggles selected dimensional constraints between those modes.