How to I change my email ID (what the receiver sees)

How to I change my email ID (what the receiver sees)

Hi,

when sending out a test-mail from my new mailboxl, the receiver sees this info:

Martin <martin@martinvondendriesch.com>

How/ where do I edit the first part ("Martin"), which stands in front of the mail-address?

Editing the address book entry seems not to work.

Thanks!

Martin