Saving in MindMeister is completely automated. Presentations that capture map sections are super easy to create and show, and replaying the creation process or restoring older versions is possible using the revert function. Digging deeper, there's a huge library of (Google-based) public maps you can browse for ideas and interesting information, professional video tutorials, and a list of keyboard shortcuts for aspiring power users. The free Basic plan allows you to create three maps, and an Edu Campus plan for schools and universities is reasonably priced.