Adding face>drag to a photo in Photos app not working

A work-around: If you cannot move or resize the faces circle, but it stays dead-center, type first the name into the name field below the circle. When I do that and the circle has a name assigned, I can usually drag the circle to the correct position and adjust the size. Sometimes it will also help to quit Photos and restart it. But I prefer to enter the name first, and only then to center the circle around the correct face.

Hello Geoff_Hawke.

Thank you for using Apple Support Communities and for sharing these details with us. It sounds like you're unable to manually identify a person. The Photos app won't let you drag the circle to the correct face. We can understand how this would be an issue. It does sound like you're using the options to manually identify a person correctly, as mentioned in this resource below:

Find and identify photos of people using Photos on Mac - Apple Support

Review the section under "Manually identify and name people in a photo". If the Photos app automatically identities a person, you won't be able to move that specific face circle. Only the ones you've manually added yourself. If you're unable to successfully move the face circle that you've manually added, try restarting the Photos app and your Mac as well to see if that helps:

How to force an app to quit on your Mac - Apple Support

Shut down or restart your Mac - Apple Support

Another troubleshooting steps that might be able to help you, is safe mode. This is a great troubleshooting step to try. If you're not familiar on how to start up in safe mode, check out the resource below:

How to use safe mode on your Mac - Apple Support

Feel free to keep us posted on your results. Cheers.