In the Reference dialog box, you select the entry (document or folder) you want to reference in a feed post or comment.

Recently used: This button brings you to the list of recently used entries. To filter the entries, enter a string to the Filter field. To pin an entry, click the pin icon. To unpin the entry, click the pin icon again. To remove an entry, click the X icon.

Open in read-only mode: To view a document, click the document followed by Open in read-only mode.