What do footnotes look like, and how do they act, when you copy and paste from MS Word?
If you just upload a PDF and use the Add Media button you get this: Microbial Origin of Desert Varnish -JStor1687344 If you link to a shared PDF hosted on Google Drive, and have iFramely activated, you get this:
This map comes from ArcGIS Online. Tricky part: find the correct URL to use!
ESRI Map Apps can be emdedded using a simple URL (and oEmbed), but ArcGIS OnlineMaps have more control with the Embed Web Map plugin.
URL from the Share dialog. URL from present page URL stolen from embed code Share URL from Prezi NEXT
Mammoth Origins https://voicethread.com/app/player/?threadId=10078212%20 VoiceThread – Home
Story Map – tour – URL from page. Shows in editor but not on front end, unless it is served as HTTPS! You can change that in ArcGIS Online from your My Content page, on the Settings tab for the