Setup > Paperwork > Documents - Locate the document you want to view. Confirm that at least "admin" appears in the "Visibility" column. Skip next step if "admin" has been confirmed.
Click open a document. Locate "Visibility" section. Check "Administrator" for admins to see. Check "Employee" for employees to see. Check "Customer" for clients / prospects to see. Click "Save" button.
Setup > Event Planning > Events - Select the event type you want the document to be viewed in. Click to open.
Locate "Additional Documents" section. Highlight appropriate documents for this event type. Click "Save" button.