The description from TeX catalogue online: ------------------------------------------ The package was inspired by the cooltooltips package. In contrast to cooltooltips, fancytooltips allows inclusion of tooltips which contain arbitrary TeX material or a series of TeX materials (aminated graphics) from an external PDF file. To see the tooltips, you have to open the files in Adobe Reader. The links and JavaScripts are inserted using eforms package from the AcroTeX bundle.