Specifies when to deactivate 3D and rich media annotations.
public enum PdfRichMediaDeactivationMode
ExplicitDeactivation = 2
Keeps the annotation active until explicitly deactivated by a script or user action.
OnPageClose = 0
Deactivates the annotation as soon as the page containing the annotation loses focus as the current page.
OnPageInvisible = 1
Deactivates the annotation as soon as the page containing the annotation becomes invisible.
At any one time, only a single page is considered open in the PDF viewer, even though more than one page may be visible, depending on the page layout.