to Old Bruce - I didn't have Snapping turned on. It was on in V1, so unless I've clicked it off inadvertently, then it didn't transfer when I upgraded to V2 by the looks of it.
to Walt - don't know why they changed it from V1 - it was straightforward - when I wanted a Grid, just a simple tick turned it on and off. After much experimentation I stumbled on the Grid and Axis item, and have set up a preset. I even set up a shortcut (cue circuits round the room to celebrate my success - a UK football analogy), but forgot that this is where the on and off tick is (I know now).
On the topic of cropping, could I ask a further question please ? I use light mode to process in Affinity, and have set a certain shade of grey for my background. In V1 when I use the Crop Tool, the background is the same shade as the base background. In V2 the shade changes to a much darker grey. Is there a particular reason for this ? The Background and Artboard backgrounds have been set the same in V1 and V2 - or almost, as there are differences between V1 and V2 in the UI interface.
In the meantime, thank you for your assistance.