How do I preview a file in Files?
You can preview a file in a course, group, or personal user file storage areas.
Open Files

In Course, Account, or Group Navigation, click the Files link.
Open File

Click the name of the file you want to preview.
Preview File
The preview toolbar displays the file along with controls for navigating pages, zooming in and out, and viewing in full screen mode [1].
When viewing documents, you can also download the file [2] or get more information about it [3].
To close the file preview, click the Close button [4].