Makes possible an automatic detection of reference layer
according to working layer defined in the Layer
field.
* If switched off , action takes reference layer
name from the Reference SM field, or it runs without reference if the Reference
SM field is blank.
* If switched on , for each working layer specified
in the Layer field, action is looking for reference layer
that corresponds to the type, side and polarity of the working layer (see
table above).
* In order to set the
default value of Auto Ref. to on ,
set pp_auto_ref to .all
(or .none to switch it off ).
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