Polycom VVX500 Quick Reference Manual page 5

Home view displays icons you can tap to access phone functions:
Touch and hold to display fewer icons. Touch and hold or swipe the
screen to display more icons.
From Home View, tap your extension number (phone line) to display your
phone lines and favourites (see section how to add contacts as favourites),
which are contact you can dial by tapping their name. To go back, tap Close
Polycom VVX500 Quick Reference Guide v1.2 Public