Unlink a file from a Heads Up
Select
Documents in the sidebar or select it in 
More .Clickon the file's right-hand side and select
Manage linked items .Select Heads Up at the top of the page.
Check the box on the Heads Up's left-hand side.
Click
Unlink at the bottom of the page.In the pop-up window, click Remove .
You can only unlink files from unpublished Heads Ups.
