Many of the website's functions are housed in the sidebar menu to the left of the webpage. Look for the row of icons to the left of the screen. Above these icons will be a button with three lines.
Click the three-line button to bring up the sidebar menu whenever you need to access these functions or if you simply want to see what these functions are.
To close this menu so it isn't in your way while filing, simply click the three-line button again.