What a HitTestIndex holds: glyphs, images, paths and links; combined to say which kinds a query looks at.
[Flags]
public enum HitTestKinds
Viewer capability 4 (hit-testing for text selection and link activation); ISO 32000-2 §9.4.4, §8.9, §8.5 and §12.5.6.5.
kind:method, kind:property, kind:ctor. Press Esc to clear.