I am wondering how Amazon did the highlight/note popup buttons in the Kindle app. After reading about UIPasteboard, UIMenuController, UIResponder, and UIResponderStandardEditActions, I am able to turn on or off standard edit actions (i.e. copy, cut, paste, select, and selectAll). However I haven't found a way to add a custom action yet. I would really appreciate it if I could get a pointer.
Thanks in advance!
Chris
(source: sampletheweb.com)
Edited by balexandre (added image instead link)