System Settings > Accessibility > Display contrast. Slider not showing.

Hi Fellow users,

MacBook Pro

macOS Ventura 13.3.1

I have lost the slider under System Settings > Accessibility > Display contrast

I was testing so that I could help another user. I dragged the slider all the way to the right and it disappeared. No amount of clicking or dragging brings it back.

I restarted my Mac and logged in as another user. I could access the slider, but the setting did not carry across to my main login account.

Now I am stuck on Display contrast > Maximum.

Regards,

Ian.