Gitk: shortcut to jump to the current HEAD (yellow spot)?

Hi!

Does anybody know about a shortcut in gitk to "jump to the yellow spot"?

I often use cmdline and gitk at the same time, switch branches, stash,
rebase and so on from bash. When hitting [Ctrl-]F5 in gitk, the last
highlighted commit is focused again and my HEAD is far off the screen.

Is there a way to jump to the HEAD (the yellow bubble in gitk) with a
fingertip?

TIA
    Dirk