This thread is interesting because it points to a piece of info people may not have (I didn't): that the "Show Markers" field in the Issue Details Dialog only affects which Change Markers are displayed on LAYOUTS.
(Now it is logical since the Issue Details Dialog is accessible from the context menu of the Layout Book icon in the Layout Book page of the Navigator, so of course it applies to the Layout Book only, but not Viewpoints and Views.)
It has no effect on which or how Change Markers are displayed in the Source Views of Drawings placed on those Layouts.
That said, I don't have a Project currently in which we would have to use Change Markers. But if I did, I would probably create two Layers (name them as appropriate):
"Change Markers - Current Issue" - All Change Markers for the current Issue would be placed on this Layer.
"Change Markers - Previous Issues" - this Layer would hidden be default.
Whenever I create a new Issue, I would make sure all Change Markers are first moved to the "Change Markers - Previous Issues" Layer.
I think this method would be useful enough and I would have to create one additional Layer.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
AMD Ryzen9 5900X CPU, 64 GB RAM 3600 MHz, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac27