Thank you Jussi - I understand now and I have it working as expected.
My compliments on the continuing very high quality of your editor (and support) which I have been using on and off for many years for C++ and T-Sql programming.
Andrew McLaughlin

Sorry if this turns out to be dumb and I'm currently using Ver 3.79g. I have set the Default Keyboard Mapping to BriefEx but the default editor keyboard shortcuts seem to remain. e.g. Search Forward is Ctrl-F not F5. I checked the editor mapping details for BriefEx and Search Forward is indeed F5 ...