Best I can offer...
ctrl-d opens manage database, but that only gets you to the dialog. If you click the fields tab you'll see the table of the Layout's table occurrence automatically selected, which may or may not contain your field as fields can be added to the layout from other tables. Once on the fields tab, you can click in the field definitions and then press a letter or two to scroll the fields to the first field starting with those letters.
Sounds like something that would make an excellent new feature in FileMaker: Feature Suggestion Form