PMK is the old Plotmaker file format. It's kind of like a PDF, except in ArchiCAD format. It keeps the line types, line weights, and scale. However, it's very compact, and still quite useful, especially for large projects. I think you can now only get to it by selecting this file format in Publisher. Use your Help menu for more information. You can drag individual detail Views directly into Publisher, and then print them all as PMKs at one time.
Richard
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Richard Morrison, Architect-Interior Designer
AC26 (since AC6.0), Win10