Piano Roll Grid Highlighting in 6/8 Time

[Lee Jackson]

Repeating a question I first asked on Facebook:

Is there any way to get the piano roll view to highlight a 6|6 16th note subdivision under 6/8 time instead of highlighting 4|4|4? I haven't been able to find this in the help file anywhere.

I started my song by loading my standard template, which is set to 4/4 time, then immediately changed the time signature to 6/8. That gave me something that looked like 3/4 time, and I haven't been able to make it really look like 6/8 since. Is there a solution?