That is an outstanding answer. Thank you so much!
As I understand it (and I easily could be wrong) I have two options for custom banners:
Restyle the original banners. The problem with this is that I can't see what the new styling looks like from within the ACP. I just have to know what the...
I'm making changes to the banner styles. I have modified app_user_banners.less, and the changes are reflected correctly in the forum. They are not reflected in the ACP, though. The ACP appears to be using a cached version of the original CSS, and I can't figure out how to get it to refresh...