There is not a dedicated button for this, but you can make one for yourself fairly easily.
Open Script Editor.app
and add this to it:
-- iTunes rewind 5 seconds
tell application "iTunes" to set player position to (player position - 5)
Save it to ~/Library/Scripts/ (where ~
is your Home directory)
Then you can use FastScripts to assign it a global keyboard shortcut.
(FastScripts allows for 10 free keyboard shortcuts. If you need more, it's $10. Or you could use Keyboard Maestro instead.)
If you want to make a rewind button, it's the same idea:
-- iTunes Fast-Forward 30 seconds
tell application "iTunes" to set player position to (player position + 30)
Source: https://www.sixhat.net/applescript-how-to-skip-30rewind-10-seconds-in-itunes.html