Animations Disappear When Loading Up Blender So, I was working on some animations the day before, and I saved my file and clicked the F in the action editor next to the ones I wanted saved (There were some other animations that I didn't know how to delete), and went to bed. When I woke up the next day, I started up the file, and all of my animations were gone. Does anyone know why this is? Is there some sort of way to save your animation, or is that what the F does, even though I pressed it?

By the way, I got then back by re-loading my old save file, I just want to know why that happened. Let me know if you need any extra details. Thanks!
The F toggle is something many of us animators have complaints about. Yes it has to be selected to keep Actions if you start a new Action. The F toggle stands for Fake User. When you start a new Action via the Action Editor the Action that you had is removed from the Armature. As objects can only use 1 Action at a time.

The correct way to use multiple actions is to use the NLA Editor. There are new buttons in the Action Editor's Header: Push Down and Stash. You can use those to save your Actions in the NLA Editor so that they don't get deleted.