ADD-DEFAULT-HINTS!

add to the default hints non-locally
Major Section:  SWITCHES-PARAMETERS-AND-MODES-OH-MY

Please see add-default-hints, which is the same as add-default-hints! except that the latter is not local to the encapsulate or the book in which it occurs. Probably add-default-hints is to be preferred unless you have a good reason for wanting to export the effect of this event outside the enclosing encapsulate or book.