To view a file in your browser, just click on it. The file opens in a new tab where it’s available for viewing. Among other options are zoom in/out (A), disable/enable fence view mode (B), download/print the file (C), post a question to the Q&A section (D), make a search request through the top panel (E).
Excel files can be viewed with or without formulas depending on the permissions:
Both internal and external links and hyperlinks are supported for easy navigation.