Restoring an older version, and locking one
Ideario saves a version of your document each time it changes, whether Ideario wrote it or you did. Tap History at the top of an idea to see them.
Pick a version to read it. Sections that differ from now are highlighted. Tap Restore to bring it back: nothing is deleted, and it becomes the newest version. You can also name a version so it's easy to find later.
Happy with where it is? Choose Lock this version from the ⋯ menu. A locked idea can't be changed, by you or by Ideario, until you choose Unlock.