"Center view on me"

How do you change the "center view on me" sprite attribute with an event?

You don't. Instead, create an invisible 'camera' object and set the attribute on that. Then, under Always, set the position of that to that of whatever you want to follow.

Or better yet, don't use that attribute at all. Simply use the scroll to x and scroll to y actions. A complex camera can be designed with an expression and/or some events. Things like slow tracking, screen shake, and whatever else you fancy can be implemented.

Many thanks. I will get going on experimenting with suggestions.

And if you need complex movement, look for the Advanced Camera plugin