Predefined values for custom tag fields

Wandering if it is possible to make a list of predefined values to select for custom tag fields same way like for Genre field and how if Yes?
Thanks in advance

see this thread from 2009:

thank you

It's a pity that it isn't possible according to Florian. It's been a desired feature for years, since the non-custom fields tease this feature.

Throughout the week I manually input a selection of values to different fields from a list, and considering Mp3Tag's automated functionality it seems a natural fit. Also would help reduce naming errors.

Just for completion and to close this topic: this has been added as Custom List Values with Mp3tag v3.18.