VKB-SIM

I use this stick for IL-2 and I understand that all the controls have 2 modes. In other words I can use SW-1 for landing gear and then switch modes and use it for say...canopy open-close.
Question is....What key or binding makes the switch between modes? I assume that is why there is a blue LED and a red LED above the F buttons.
-or- is it something I have to program.

Look here https://mega.nz/file/0Bl1TSQA#et4YmCbtbWNLYrRqqETC5rZpWhTZLAogQ5-FBvtCmqI.
Some ways.
Tempo function. Button response depends on depressing time.
Shifts. Similarly to keyboard - modify buttons.
Try. Any further questions are welcome.

Let me ask this another way.
What is the left red LED above the F buttons for?

For indication, Victorus answered the same. Try unplugging the grip cable and see how the Leds react.