There are 2 methods Instructors can use to un-hide (show) files or folders.
Method 1: Select files or folders / Show
Method 2: Actions / Edit Details / Show
Select the Resources tool from the Tool Menu of your site.
This displays the Show Items Confirmation page.
To unhide a file or folder, to the right of the file or folder, from the Actions drop-down menu, select Edit Details.
This displays the Edit Details page for the item.
Under Availability and Access, select Show this item, then click Update.