The sidebar dock
The dock runs across the top of the sidebar and allows you to switch the sidebar between different views. The leftmost icon in the dock shows a palette of all available sidebar views. Clicking an icon on the palette will load the corresponding view.
You can also drag icons from this palette to the dock to add them for quick access, or drag icons out of the dock to remove them. Icons already in the dock can be rearranged by simply dragging them around.
Sidebar views
The available sidebar views are:
Note: The sidebar is not visible in the Sites tab.