It would be most helpful if, in the Layers Dialog Box, you could see layer elements toggle on/off in the drawing window. There was a plug-In that did it in a previous version of ArchiCAD, but it doesn't work for 27. This should be a core feature. Most software has it. Perhaps there are other workarounds, but it just seems to me that it's long overdue.
Edward Wolfstein, AIA, NCARB, MRAIC, CSI
Wolfstein Architecture
Burlington, VT 05401 USA
macOS High Sierra 10.13.3
4 GHz Intel Core i7
32 GB 1867 MHz DDR3
AMD Radeon R9 M395X 4096 MB
ArchiCAD 21 (USA Full)
