No pop up of references in X8

Dear All,

I recently switched from Endnote X6 to X8 on my system (Mac with Office 2011). One feature which appeared to be quite useful is missing now with X8:

Presviously, when I moved the mouse pointer across a reference number in my Word document, a pop-up appeared and showed the name and the number of the refence.

This feature no longer exists after upgrading to X8.

Is there a chance to re-establish this feature again? Does anyone know?

I would appreciate help very much…

All the best, and thanks