AM_CREATE_CENTERLINE adds center lines to circular elements.
+-------------<------------+
| |
| |
---->(AM_CREATE_CENTERLINE)----+----|circular element|----+----->
This command has no options. Simply indicate a circular element
(circle, arc or fillet).
Use this action to add center lines to circular elements.
AM_EXT_CENTERLINE terminate action,
AM_ROT_CENTERLINE terminate action,
AM_ROT_CENTERLINE_BY_ANGLE terminate action