Indicates why a preview refresh was requested.
public enum PrintPreviewUpdateKind
kind:method, kind:property, kind:ctor. Press Esc to clear.InitialPreview generation triggered when the host is initialised.OptionsChangedRefresh requested due to updated print options (paper size, margins, etc.).PageNavigationThe user navigated to a different page in the preview UI.RefreshRequestedA catch-all refresh request (e.g. diagnostics or manual reload).