How do I determine the Direct Injection pump lobe offset?

For DI pumps that run off the camshaft, as described, the angle in crankshaft degrees from the tip of the pump lobe to the pattern lock position for that camshaft.

In the reference mode help, modes that are commonly used in DI applications have the camshaft pattern lock position defined.

Technically any lobes offset can be used, but common practice is to measure from the camshaft lock position to the nearest lobe.