Double tap to wake screen

[Incanus]

There have been answers already in several threads, for example:

Question: how to turn on screen?

So I am looking to use the phone with a bicycle but I see a problem: the only way I figured out so far to turn on the screen is by pressing the power button. My previous phone had front-facing power button, but the FP3 has it on the side and in a waterproof bicycle case/mount, it is very difficult to do so. I have been searching Google for an alternative solution, but so far the closest thing I found is binding volume buttons or something. The use case is simple: I have access to the screen bu…