If you need to change the output resolution of your BrightSign player, you can do that by following these steps:
Browse to the IP of the player and port 8000 (EXAMPLE: 192.168.1.100:8000)
login using the default username: [admin] and the default password: [the BrightSign players' serial number]
Navigate to the Outputs option and change the resolution to the desired output and save.
The device will reboot and may require the screen it's connected to, to be turned off and back on again in order for the correct output to apply to the screen.