4 ms·The square brackets are shortcuts for slowing down and speeding up.by avhon1 9y agoThe square brackets are shortcuts for slowing down and speeding up.jtolmar 9y agoWell that's good to know. I'll change that problem to "the playback speed menu items don't show their shortcuts" then.goldenkey 9y agoYou can always submit a small patch for the shortcut captioning. I would + it.