When you draw the roof, the Rafters (planks?) are always perpendicular to the plate line (original reference line), change the location of the plate line and the incline direction and you will get them to show correctly.
jacek lisiewicz
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arkhos-tekton, architects
carmichael, ca
Mac OS X 10.15.5
IMac Retina 5K, Intel Core I7
32 GIG Memory, AMD Radeon R9
ArchiCAD 24