Change shown Field after select in Advanced Search Field (f.e. in new communication)

Hello,

i've got a simple question. After you choose a - f.e. - Company from an advanced search field (like in any communication) there's always their full phone number under the text field.

How can i change data is shown when i select a company? Like i additionally need not only the business number, i want it to show e-mail etc.! Where can i change that?

Thanks for any hints and informations!