In the Part-Editor, use the Constraints menu and toolbar to add Constraints.
You can add Constraints
oto a sketch-element
obetween two sketch-elements
obetween a sketch-element and the X-axis or Y-axis
See below: Why cannot I add another Constraint?
See below: How to Delete a Constraint.
See also: Geometry menu and toolbar
Part-Editor > Constraints toolbar is to the RIGHT of the graphic-area.
You cannot see Constraints you have added to sketch Geometry the graphic-area.
To DELETE a Constraint, you must show it in the Selection-Window.
To show a Constraint in the Selection-Window:
1.SHIFT+CLICK a sketch-element
1.SHIFT-Click a Point, start-Point, end-Point, or a center-Point
ALL Constraints that you have applied to the sketch Geometry are now in the Selection-Window.
In the Selection-Window:
2.Right-click the Constraint
In the contextual-menu:
3.Click Delete element.
Add MERGE-POINTS (between two Points*) will delete a Point*
Usually, use Merge-Points to make a sketch-path or sketch-loop.
You can NOT delete Points* that are Merged with Merge-Points
Add Coincident Constraint (between two Points*) will not delete a Point*.
Usually, use Coincident-Constraints for construction geometry.
You can delete a Coincident-Constraint to move the Points* again - see How to delete a constraint.
* Points are Points and also start-Points, end-Points, center-Points.
You cannot add a constraint that would OVER-constrain a sketch-element.
E.g.: A Point* has two degrees-of-freedom.
1.If you add a Coincident Constraint between a Point and a Line (CoincidentPtoL) you remove 1 degrees-of-freedom.
2.Then, you attempt to add a Coincident Constraint between two Points (CoincidentPtoP) you will attempt to remove 2 degrees-of-freedom.
However, it is not possible to remove three(3) degrees-of-freedom from a Point.
To correct the problem, delete the CoincidentPtoL - see Delete Constraint. - then Add a constraint between the two Points.