This is after the flip (H2)
Remember you can make images clickable by adding a link to them from the WYSIWYG.
Nam venenatis ullamcorper nisl, id viverra urna tincidunt sed. Mauris a dignissim nisl. Duis diam neque, dapibus nec elementum sit amet, porta eu leo. Integer mattis sodales leo eget sagittis. In rhoncus justo nec scelerisque iaculis. Nulla imperdiet lacus et est tempus, eu blandit dui pharetra. Donec nec erat finibus, auctor mi quis, maximus est. Donec quis sem arcu.
Mauris ac scelerisque tortor, sed placerat est. Nullam ut elit libero. Donec congue laoreet malesuada. Proin in lorem vel elit dignissim egestas et eu nibh. Quisque viverra turpis eros, vel suscipit eros maximus vitae. Vestibulum ultrices tristique orci quis dignissim. Nulla non ullamcorper lacus. Phasellus volutpat velit sed est feugiat vulputate. Nam eleifend nisl vel nisl dapibus, non vehicula ante imperdiet. Suspendisse euismod magna libero, eget euismod tellus auctor at. Morbi tincidunt aliquet sagittis. Phasellus faucibus imperdiet nulla, ut ultrices ante sollicitudin sit amet. Suspendisse potenti. Pellentesque malesuada quam sit amet neque pulvinar feugiat. Aliquam erat volutpat. Phasellus nec mauris at neque sollicitudin lobortis vel eget urna.
Link to external site (h4)
If PDF's are small enough they can be displayed as embeded by adding them to the files tab and them pasting the link as plain text here.
Check with NationBuilder support to see if your third-party site can be embede (or simply try pasting the link of the external site as a plain text and see if it takee it)
Examples:(H3)
PDF:
Third-party site (e.g. youtube):