After you've installed CRM for JIRA go to CRM Admin menu.
|String||The field to store single line text|
|Number||The field to store numbers|
|CRM Company||Links contact to the company in contact's card|
|CRM Contacts||Shows all contacts that are linked to the company in company's card|
Let's configure contacts first.
Create Tab and click 'Add'. You can create several tabs that will appear in contact's card.Add Attributes and select one of them to be the title
Then do the same with Companies:
Add Attributes and select one of them to be the title Only String type attribute can be the title. After adding attributes there will be no possibility to edit them, you can only delete and create new.