How can I adjust the display contrast on my Suunto Core?

To change the contrast on the Suunto Core you need to put it in sleep mode. Note that this erases unlocked logs!

1. Press [START/STOP], [VIEW], [+] and [LIGHT] buttons simultaneously until SUUNTO appears on the display.
2. When the display is blank press [MODE] until the watch wakes and shows SUUNTO.
3. While 'SUUNTO' is displayed, press [START/STOP] until the service menu opens.
4. Press [+] or [LIGHT] to scroll to Contrast and then press [MODE].
5. Change the contrast using the [+] or [LIGHT]. 
6. Press [VIEW] to exit.

Suunto Core