If the document has already been added via Documents, it can still be added to a specific meeting. The meeting must have already been created.  

Step 1

Go to the Documents section. 

Step 2

Find a document to add to a meeting


This is a meeting tag.  

Step 3

Drag the meeting date tag to the "+ tag..." section

Once the background changes to green, drop the tag. The document has been added to a specific meeting.

To learn how to add documents directly to a meeting - Click here