The Auto-Complete feature stores any entries that you type in a PDF form field, and then suggests or even automatically enters responses that match your typing in other form fields. The suggestions appear in a pop-up menu, from which you can select a match. The Auto-Complete feature is off by default, so you must enable it in the forms preferences if you want to use it.
If you want to remove an entry from the Auto-Complete memory—such as a misspelled entry that you found and corrected later—you can edit the list in the preferences.
To remove all of the entries, click Remove All.
To remove some of the entries, select the entries and click Remove. (Shift-click to select multiple adjacent entries; Ctrl-click /Command-click to select multiple nonadjacent entries.)