The Admin Panel
Once you have logged in, the display will be split into 2 sections. The Site View on the right hand side, and the Admin Panel on the left hand side.
The Admin Panel is split into 4 sections. You have the Toolbar at the top, with the General Tab active, next to the New Plugins Tab and the Plugins Tab.
Hide and Show Admin Panel
You can hide and show the Admin Panel, giving you more viewable space, by clicking the toggle arrow halfway down the right hand side of the Admin Panel, indicated by a little arrow.
Clicking this arrow will either hide, or show the Admin Panel, depending on your current view.