@ Idolse & @ dwanthny,
Finally, the penny has dropped
I hadn't appreciated the "all or nothing" nature of this option.
The other indents threads I found seemed to quickly drift away from the indent question (without really answering it) and get into paragraph spacing issues, or whether to use pixels, points or ems as the unit.
All or nothing is indeed a broad brush - and inappropriate for text that is centered - do you think the development team might be persuaded to change that?
Guys (Girls?), thanks for your patience - I am a bit slow on the uptake - but it's much appreciated!