Displays a Help button in the sheet or panel.
- macOS 10.4+
YESto display the help button. The help button is hidden by default.
When a user clicks the help button, the choose identity panel first checks the delegate for a
certificate method. If the delegate does not implement such a method, or the delegate method returns
NO, then the
open is called with a
nil book and the anchor specified by the
set method. An exception is raised if the delegate returns
NO and there is no help anchor set.