I somehow managed to get my SE to place a hole prefix in all dimensions automatically. I don't know how this happened and can't figure out how to stop it.
when dimensioning is active but nothing is selected setting
prefix, suffix a.s.o then all dimensions will take that
setting from now on. This may inadvertedly happen after
placing a dimension and then set a prefix. Everything is
still shown within the toolbars but nothing is selected
anymore.