Repeat the last search from the Find dialog with the same options — Find Next (F3) forward, Find Previous (Shift+F3) backward. Both work while the dialog is open and after it is closed. If no search text has been entered yet, the Find dialog opens instead.
With the dialog closed, the status bar keeps showing the position in the
file, for example Find "Marker": 3 / 400.
Esc removes the match highlighting.