Curious about Custom Tabs / Custom Fields

Hi all,

I'm a new user and slowly getting my head around migrating a complex ActiveCampaign data structure with LOADS of custom fields for both Contacts and Companies.

In the Contact and Company record views there is an option to have a custom Tab - but so far I can't work out how to put custom fields on that tab. This is especially needed in Company view as the column with custom fields is quite narrow, so I anticipate scrolling for ages to see everything.

Is there a way of adding custom fields to custom tabs for contacts and companies already? If not, has anyone explored developing a custom plugin to do this job?

Many thanks in advance,

Israel.