InDesign PDF Tooltip, a free script that helps you add tooltips in InDesign for PDF output.
Enter the tooltip string, select the area in the InDesign document.
Press Make Tooltip, create a button in InDesign to export as an interactive PDF tooltip.
Above, see the tooltip.
Original concept by Keith Gilbert, Gilbert Consulting. Linky
Download the script HERE.
Download a sample PDF HERE. To see the tooltip you will need to download the PDF and open with Adobe Reader, hover the mouse over 'and'. Keep up to date with what we are working on TWITTER.
Limitations: currently limited to InDesign 5, 5.5 and 6.