[Sugarcube] Adding content to the Sidebar

So I'm wondering how you add content to the sidebar.
I'm gonna be honest, I have no idea where to even begin.

Essentially, what I want is my story's UI to be located on the sidebar. A "continue" button to allow the player to progress, a button to take them to the inventory screen, etc.
I guess I'm asking... How do I put <<click>> macros + their scripts and [[Link]]s so that they show up on the sidebar? Is it even possible?