How to display category as a list?
@Condorr category display depends on the theme you are using. Vanilla and lavender themes display categories as titles.
This forum is using nodebb-theme-persona, this is a new theme and is only compatible with NodeBB v0.7.
NodeBB v0.7 is not released yet. You can either upgrade and use development version and switch to persona theme (there may be bugs) or wait until v0.7 is released.