Hi Janet
Thank you for your reply. I have tried your suggestion and, not sure if this is related to the 'version' comments above, but when I select the dimension a small window opens over the top of the dimension on the drawing to modify the dimension number itself. There does not seem to be an option to 'grab' or highlight and then move the position on the page. I have tried switching on/off the 'modify' option (for In-Line Measurements), and the 'off' option just doesn't allow a left click or right click activation of the dimension when shown after an item has been selected.
I can tab from dimension to dimension, though, which is useful. (But not Shift/Tab to reverse selection....?)
Rgds
Andrew