Upon selecting SharePoint, you will see the following log in prompt.
Enter your account and password and select "Sign in".
When working within Reveal, you will be able to use a wide variety of files:
Spreadsheets: Excel (.xls, .xlsx) or CSV, which you can use dynamically within Reveal.
Other files (including images or document files such as PDFs, texts, etc.), which will be displayed in a preview mode only.