What is the Programmable button for and how do I use this?

1. This button allows you to open specific Apps on either short or long press of the Programmable button.
2. Go to the settings menu, scroll down to “Programmable Key” and select.
3. This will open 3 options for the device PTT, Double Tap and Long press.
4. Tap on Double Tap this will open a screen where you have a number of applications that you can select, select 1 for example Camera then select OK.
5. Next, tap on Long press and select an alternative option for example Calendar and then select ok.
6. Now when the device is open a Double Tap on the programmable button will open the Camera App and a long press will open the Air App.