PdfHighlightMode Enum
The annotation's highlighting mode, the visual effect that shall be used when the mouse button is pressed or held down inside its active area.
Fields
| Invert | Invert the colors used to display the contents of the annotation rectangle. |
| None | No highlighting. |
| Outline | Stroke the colors used to display the annotation border. That is, for each color channel in the color space used for display of the annotation value, color values shall be transformed by the function 𝑓(𝑥) = 1 – 𝑥 for display. |
| Push | Display the annotation's Down appearance, if any (see 12.5.5, "Appearance Streams"). If no down appearance is defined, the contents of the annotation rectangle shall be offset to appear as if it were being pushed below the surface of the page. |
| Toggle | Same as Push (which is preferred). |
| Unknown | The highlighting mode is unknown. |