Here we go, the best way for me to answer my own question is to post here. I’ll likely find the answer in a minute.
I want to default to Graphic Editing when switching to Engrave Mode. The Help page says this choice is available in Preferences–> General. I can’t see it. If it’s there, it’s old age setting in. Is it still in there?
https://steinberg.help/dorico/v4/en/dorico/topics/engrave_mode/engrave_mode_engrave_toolbox_r.html