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

This button allows you to open specific Apps on either double or long press of the Programmable button.
1. Go to the Settings menu, scroll down and select “Programmable Key”.
2. This will open two options for the device: Double press and Long press.
3. Tap on Double or Long press. This will open a screen where you have a number of applications that you can select from, for example; the open the Camera answer or turn on/off the flashlight.

Note: Both double tap and long press can be configured but only one option can be used at a time.