I am activating the hud display thru the settings wheel. My 2018 Prius Prime Advance will let you adjust the brightness but will not let me raise the hud. Thank You for your assistance.
The height adjustment can be found by turning off the HUD then turning it back on and immediately use the D-pad on the right side of the steering wheel to adjust the height.
To locate the height adjustment setting, start by disabling the Heads-Up Display (HUD), then re-enable it. Immediately after turning the HUD back on, utilize the directional pad located on the right side of the steering wheel to modify the height as desired.