Intrument track notes light gray transparent - how to change to black colour?

Notes colour is grey-transparent in the project area (not piano roll)
I want them black as I can see it in other Cubase online videos.
I tried all the options in Preferences - custom colours etc. nothing works.
You can not see notes - please see the screenshot!
Is this a bug?

Hi and welcome,

If you don’t have much other preferences setup, you can use Cubase Safe Start Mode.

Thank you a lot!

Best Regards,