How to enable vertical sync? (Assassin's Creed: Odyssey)

Twist the other settings, maybe something is blocking.
..reinstall the game.

from steam installed. Was updated today. Again 40 gigs to pull... No thanks... But the test file will do.

File check helped.

AlexKHAB
in control panel, dump all settings at standard. delete the config file of the game. run as administrator the game.

it does not work with adaptive quality