Check Model View Options > Options for GDL Objects (ArchiCAD 13) > Show Opening Lines in 3D for Doors and Windows > Line Orientation [Handle or Hinges].
David
David Maudlin / Architect www.davidmaudlin.com Digital Architecture AC29 USA Perpetual • Mac mini M4 Pro OSX15 | 64 gb ram • MacBook Pro M3 Pro | 36 gb ram OSX14