UV Mode

If you miss the UV Points and UV polygons from previous versions of Cinema 4D: these were removed and replaced by the Point and Polygon modes that already existed. In addition, the modes were integrated into the UV Editor, i.e., edges can also be selected and modified there.

Therefore, when you switch to Use Polygon mode, UV polygons can also be selected and edited in the Texture UV Editor. The same applies to Use Point and Use Edge modes.

Selections are made synchronously in the Perspective Viewport and the Texture UV Editor. This will save users a lot of clicks in the future!

The UV Mode is important when editing (e.g., moving) in the Perspective Viewport:

UV Mode enabled: Instead of the mesh geometry (points, edges, polygons), UV elements (UV points, edges and polygons) will be edited.
UV Mode disabled: Only the mesh geometry (points, edges, polygons) will be edited and UV elements will remain unaffected.

This mode has no meaning when working in the UV Editor alone (except that, if disabled, different options will be made available for the Selection, Move, Scale and Rotate tools depending on which Manager is active - Texture UV Editor or 3D Viewport). The active Manager is highlighted with a thin white outline.