Visualizing Depth of Field - What camera is this?

Hello. I’m currently trying to understand and tweak depth of field and thought is would be a cool idea to use the visualizing tool to do so.

Thing is, the preview is from a camera that is unknown to me. It’s not my TPP camera (It uses Gaussian while the visualizer says “Bokeh”). So I can’t change the values to check out the color mapping of my settings.

There used to be under the arrow menu something about setting up a camera for the view, but I don’t see it anymore.

So, how can I change the values on the viewport ?