If you are still using AC8.1 - the automatic numbering from PlotMaker is not bi-directional so it is not worth using in ArchiCAD.
AC10 allows for better automatic numbering (though still not completely bi-directional).
David Larrew, AIA, GDLA, GSRC
Architectural Technology Specialist
a r c h i S O L U T I O N S
WIN7-10/ OSX 10.15.7
AC 5.1-25 USA