Although I have done this to make sure the "show Column Symbol" is checked:
"To show or hide the crossing symbol of columns on the Floor Plan, check/uncheck the “Show Column Symbol” box in Document > Model View > Model View Options > Options for Construction Elements."
..and in the tool, column, floor plan symbol, floor plan symbol type "crosshair", is selected,
the crosshair does not show on my foundation plan.
So, don't know what else to try.
Suggestions appreciated!
ArchiCad 19