If the stencil data contains objects that should not be included in the stencil, these should be deleted.
Choose a layer and then use the left mouse button to draw a selection rectangle around the openings to delete. Only openings on the chosen layer are selected. The selection modes are described in the Graphic display section. Click on the Delete selected button to delete the highlighted objects.
If necessary, the Undelete objects button may be used to restore all deleted objects.