The Document List is docked in the upper section of the left panel, and the
Project List is docked in the lower section. If the layout you see is not similar to the one shown above, look at the strip at the far left border for the vertically-displayed tags
Document List and/or
Project List. You can hover your mouse over any of the tags, and the window will slide out. Then, click the
Pin button

at the top-right corner to dock that window.