When you create a custom taxonomy, seemingly the only options are to display it as a tag (non-hierarchical) or category (hierarchical). Is there a way to display them as a dropdown menu? Thanks.

When you create a custom taxonomy, seemingly the only options are to display it as a tag (non-hierarchical) or category (hierarchical). Is there a way to display them as a dropdown menu?

I realise that this an be done using add_meta_box() and actually manually adding it, but I'm looking for a builtin way (if one exists), to save lots of code! Thanks.