Can custom fields be grouped/organised?

[Keith Furnell]

Three custom fields are offered in the free plan as a teaser for the standard and premium paid plans (offering 50 and 100 respectively).

For those that have signed up, are those custom fields just presented as a big alphabetic list, or is there any functionality to group related fields?

Would imagine that with 20+ fields that some level of organisation becomes required, and hopefully that isn't just crudely through judicious selection of field names?