To view an expanded structure of the project, including folders and files:
1 - Click on the Sitemap icon on the left panel. This will now show the entire list of files and folders in the main workspace
2 - You can open a document by just clicking on the file name
(you can also do a CTRL+F(WIN), CMD+F(Mac) and search for a file)
3 - You can download the sitemap into a excel sheet by clicking on the Export icon on the top right corner