Click Centerline
on the Annotation
toolbar.
In the section view, select the two edges of the top hole.
Add centerlines to the section view and detail view.
Click Centerline
on the Annotation
toolbar.
In the section view, select the two edges of the top hole.
A centerline appears between the two edges.
Repeat for other holes in the section and detail views to add three more centerlines.
Click 
.
