No, that's not it. It's being able to select an element in the UV window and have the corresponding element highlighted on the 3D object. If I click a vertex on my UV, it should highlight the same vertex in 3D view.
Individual elements can be rotated by specific values via the Properties panel ("N") - "Rotatation" X/Y/Z. Or similar from "Object" properties (button with the orange cube on it). Also hold "Ctrl" whilst rotating to snap. I've never done this myself but it might be possible to create a new "Custom Property" with a custom…