Devo 7E - Assign a key to 7th channel

Hi!
Now I have a Devo 7E and using it with my Mobula 6 quad.
My question: Devo 7E is a 7 channel radio, right? It has only 2 switches (Hold and Fmode). I'm using Hold to arm the quad, and the Fmode to switch between Level mode and Acro mode.
Is there a way to use the 7th channel assigning it to another key, or do I have to do the "add switch" mod in my Devo7?

I would like to assign the "Horizon" mode to the 7th channel, or even the "turtle mode".

Thanks, guys!

Have a look into virtual channels. You can turn the trims as a switch to turn channels on and off.

Edit the trims under the menu heading and then assign the trim to a channel switch

For the Future you can also add very easy two more switches to your Devo 7e.

Have a look here: deviationtx.com/forum/how-to/1436-add-tw...-to-the-devo-7e#6379