Octava bassa

How can I get 8vb instead of 8 bassa where I am constrained for space?

Using the popover, for a single crotchet I get just 8 and a line, but for a dotted minim it persistently shows 8 bassa even when I enter 8vb.

What are your settings for octave lines in Library > Engraving Options > Octave Lines?

Aha! Now correct setting:

image

Problem solved! Thanks @Lillie_Harris .