You can dimension and inference datum targets to specific points.
You can use vertex inferences in both drawing and sketch environments to place datum targets.

While sketching in parts and assemblies, you can use reference dimensions and model dimensions to control the location of the datum target points. These dimensions are driven in the model environment and driving in the sketch environment.

When you select a datum target in the graphics area, the geometry it is attached to is highlighted.
Previously, this functionality was only supported for drawings.