Is it possible to duplicate field options?

Hi Guys,

So I work for a print management company, and I'm using Ninox (at my own expense) to manage suppliers. We have 'groups' of work that we have certain suppliers associated with, and suppliers can be in more than 1 group.

So for instance a group many be 'business cards' and a supplier can be in that group, as well as 'brochures' for example.

I've listed all the groups in a drop down field, and have 3 different fields 'Group 1', 'Group 2' & 'Group 3' where I can select the relevant groups to include them in. There's quite a few groups, and I'm wondering if I can 'copy' the options to another field, or whether I have to manually do it each time (that's a lot of work).

Any ideas, or am I missing something really obvious? there is a chance........... ;-)

Thanks in advance,

M.