What are these buttons for?

What are these buttons or diamonds or elements good for in Action Editor? I can see that these do list all poses I have created but I cannot do anything with these - just select with RMB and that’s all. I have watched many tutorials about rigging and animation and have never seen a word about these. I can not even make a search because I don’t know the name of these.

http://www.arvutigraafika.ee/files/action_editor_buttons.JPG

edit: Now the picture should display. Probably the ads did disturb my attention that what forum is what for.

Your picture is not showing, are you talking about the keys?

BTW: this forum is for finished animations, questions should go in the support forums below.