I am designing in Creo Parametric 4.

I have an extruded part (Extrude1). When I right-click on the Extrude1 and I select “Edit Definition”; I will like to adjust the Depth of the Extrude1 by inputing the value into the edit-box. Not by dragging the drag handle to adjust values.

How can I disable this drag-handle functionality; because I don’t want to drag it to change the length of the extrusion?