No info showing in Company section of CRM View for Activities

No info showing in Company section of CRM View for Activities

In the CRM View for Activities (the one that shows Customers, Open Potential, Leas/Contacts, Others in the one screen)
- how do i get an Account to show in the Customers section?  have tried various things, and can't get any Account info to show in there

- also is it possible to customise this? e.g., get rid of the Others tab and perhaps add my own custom tab showing info from another entity

Regards,
David