To Control the Display of Constraints
Contraints are displayed in Sketcher by default. To toggle their display, perform the following operations:
• Set the sketcher_disp_constraints configuration option.
• Click or clear the Show constraints check box in the Sketcher area of the Creo+ Options dialog box.
• Toggle the 
Disp Constr button in the 
Sketcher Display Filters on the Graphics toolbar.
Disp Constr button in the Sketcher Display Filters on the Graphics toolbar.• Click > > Disp Constr.
Disp Constr.