I've opened #1883278: Integrate with WYSIWYG editors (Insert?) against Fill PDF. Fill PDF doesn't currently provide any fields, so wondering what the best way to integrate would be. It seems like adding a field would get me the most free. Are there any other hooks/APIs I should look at if I want to basically expose a custom hyperlink creation interface? Is integrating with Insert the wrong way to go here? I'm thinking about it and hoping to get more tested WYSIWYG editor support for free too, rather than rolling my own.