Adding Buttons to Player

Does anyone know how to add Menu/Notes/Glossary (etc) buttons to the player? I don't want those items on the side, where they normally are, in the side menu. Rather I want buttons for each on the top of the player. I see how I can add the NAMES of thesse buttons by clicking on the paper-icon in the player properties window, but I don't know how to add actual functionality. That is, how do I make the Notes button show actual NOTES? 

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