Screen brightness settings keep changing

Re: "MacBook Pro 13″, macOS 10.15 :

Screen brightness settings keep changing"

Your Mac's Screen brightness setting may be set to adjust automatically yet there are also manual control settings you can use.

See Apple Support's article for Mac OS 10.15 for all the "how to" info.

Change your Mac display’s brightness - Apple Support

Thank you kindly for taking the time to reply, and to share your experience. Cheers :-)