protozoan

If by "zoom" you mean in the viewport only, without changing the actual render output (for example to see something you edit bigger and more clearly): On the left side of the viewport, there is a 'view' icon (small camera icon), if you right click that, you can change the mode from "3D camera" to "2D pan and zoom" which lets you zoom and pan around in the view as needed.

If I had to guess I'd say that someone accidentally yanked the plug out of the wall that updates the changelog

Select the node, press "X", and it will create a visualizer that overrides surface.