Please see the following link to the DAS Unify instructional PDF document:
https://www.oregon.gov/das/OSCIO/Documents/How-to-program-function-keys-on-IP55.pdf
Please see the following link to the DAS Unify instructional video:
https://www.youtube.com/watch?v=6C7PBmjuEYw&list=PLuYFvEY7TlqLIiKiKzTIv07_x3ad68lnw&index=13