ToDo: PMK file description.
Save Used Attributes Only
There is a checkbox at the bottom left of the Save As dialog for saving the used attributes only. This option allows to create smaller PMK files. If you save a PMK file without this checkbox checked in, all the attributes (line types, fill types) that are available in ArchiCAD are saved into the PMK file itself, even if many of them are not used at all.
However, if you check this box when saving, only the used attributes will be saved into the PMK files, so the file size will be reduced but you will not have all the fills/line types you had in ArchiCAD available in the PlotMaker drawing!