Silkroad Online Forums

Hi everyone,im very new here and i need some info.
In Silkroad i can see toolbar in the lower of the screen where i can put skills and other shit.
But i see a spot marked as "M" in the middle of the toolbar..What i need to put there?What is that anyway?

Sorry for terrible english

You can put anything in there. It's the slot that you use by pressing your mouse scroll or by pressing "X"
It's just like the other slots