This tool enables you to define whether to delete all dimensional and geometrical constraints, as shown in the procedure below.
To delete dimensional and geometrical constraints:
Create a sketch in the sketcher and add constraints as required:
Click the Sketcher Tools 
icon.
The Sketcher Tools toolbar is
displayed. Click the Show Constraints
icon 
, and then select the entity for which you want to
view the constraints, as follows:
Click the Delete Constraints 
icon.
The Delete Constraints dialog
appears:
From the Delete Constraints dialog select the required constraints to delete, as follows:
Check the Geometrical checkbox to delete all geometrical constraints.
Check the Dimensional checkbox to delete all the dimensional constraints.
Click Apply 
to delete the
selected constraints. In this example all the constraints will be deleted.