I want to improve pdf readibility in following way. I know that pdfcomments and fancytooltips packages are available, but I can't imagine whether it is possible following action. I wish to insert tooltips into PDF documents – a popup windows appears, if the mouse hovers on equation reference. The popup window should show to the reader the eqation written somewhere in the document.
Normally I use lualatex for pdf compilation, therefore it seems that I cannot use the solutions provided in Mouseover events in beamer: hovering on \eqref and a comment containing the original equation popping up.