The HCU Button: Located on the right side of the LED display unit (drive side) under the stem.
Single Tap: Locks or unlocks the tilt function. In locked mode, the bike ignores app incline changes and only responds to manual shifter commands. Unlocked mode is required for virtual app control.
Double Tap: Instantly levels the bike back to a **0% neutral flat position
Also:** If you have trainer difficulty at 0, it does not tilt.. it tilt’s accordingly to the percentage and percentage of trainer difficulty. (i.e.: if u have trainer difficulty at 50% it only tilts 5% if grade is 10%)
Provided you are in a normal ride (ie, not a workout) then when you enable the tilt-mode (from the control on the bike) then it should go up when you ride up hills. Even in ANT+ connections. I use bluetooth with mine.
In Zwift if you have trainer difficulty at 100% and the tilt function on, it should work: