We've recently added a small feature to the file detail area within Glasscubes.

Have you wanted to send a sales proposal or invoice to someone and wondered if they have open and viewed the file?

Well you can do that now in Glasscubes - simply click the checkbox 'Notifiy me by email when someone views this file' , now click on the 'Share this file' button copy the web address/URL and put it in an email.

Now when sending out an email rather than adding an attachment you can use this with the Share link and get notified!