Interface HighlightSetMemento

Highlight visibility may be controlled by the Highlight.visible flag, the HighlightSet.visible flag, or the OIDocument.highlights.visible flag. Highlight sets may also be shown or hidden at the View level via the View.highlights.show() and View.highlights.hide() functions. In order for a highlight to be visible in a View, the visible property on the highlight, highlight set and OIDocument.highlights object must all be set to true (these properties are true by default) and the highlight set must be shown in the view (all highlight sets are shown by default).

Visibility for individual highlights may be set separately via [Highlight.visible] property. Changing the visibility of a highlight set affects the visibility of the highlights within it, but does not permanently change the value of the visible property for those highlights. If a set contains both visible and hidden highlights, changing the set's visibile property to false will hide all of the highlights in the set but setting it back to true will restore the former visibility state of those highlights.