What dbh suggested was to have the ruler set to bars and beats, which I had already done, and to change the quantize value to say bars or beats. This does help a little with dragging, but it doesn’t change the grid lines or divisions visible in the grid and ruler, which was what I was originally asking. I just think it would be helpful to have a little more control over the level of detail shown here.
Truth be told, I find the snap functionality in the Project Window a little strange. For example, if I set a loop range in the ruler, but want to drag the whole range to just before the beat (overrriding snap), I can’t so this using a key modifier. I have to disable snap altogether using the snap button (I don’t think this can be assigned a key command even, but I could be wrong), and then drag the loop range. This of course means snap is disabled for the whole Project Window, so if I forget to re-enable it again, then the next copy/move command will be difficult.
This means I’m constrantly switching snap on and off whilst I’m working, so I can move locators around to positions just before the beat (otherwise loop-backs miss notes which are fractionally before the beat). Ideally I would keep snap on, and have it use quantize for the snap resolution, with quantize set to 1/16th. However, in order for this to be workable whilst I’m dragging and copying parts around, I need to be able to see more grid lines and ruler divisions, otherwise it’s close to impossible to drag and copy to the right place.
Sorry for the long-winded explanation, and thanks for your input.