How to bind and configure deepfly:
It is
highly recommended to read the article below thoroughly, you may learn a bunch of useful things.
URL:
https://wiki.ddnet.org/wiki/Binds#Deep_Fly
or if you prefer to not read:
Move the attached text file to your config directory, and then type:
exec deepfly.txt
into the ingame console (F1).
To toggle deepfly on/off, press the C key on your keyboard.