Stuck in a mode..?

I've got an editor I'm working with and she somehow stumbled into a mode I've never seen before. Her mouse has become this little circular-dot-cursor and its altered the way she works with the document. I've hit all the major places I usually see things change for ID but this.. this escapes me on how she got there or how to get her back.

Does anyone have a clue they can share?

Thank you kindly.