How to assign a theme to a group?

Thanks for confirming Sam.

I’ve been developing a theme with modifications suitable for staff, but now realise I can’t make that theme available for staff, mods, a group or even for myself (except for hitting preview theme each time), unless everyone gets access to it. Seems like a useful feature. And would make theme testing easier before releasing themes to all.

I haven’t dived into Plug-ins.