How can I use the Audi A7's head-up display effectively?

I recently purchased an Audi A7 and am curious about the head-up display feature. How does it work and what are the best ways to utilize it while driving?

The head-up display in the Audi A7 projects important driving information directly onto the windshield, allowing you to keep your eyes on the road. To use it effectively, adjust the display's brightness and height for your preference.

In addition to standard driving information such as speed and navigation directions, the head-up display in the Audi A7 can also project incoming calls and song information from your connected phone.