Undo and redo

Did a papers add and are unhappy with the result?

papers undo

will revert to the previous version. Without git-tracking, repeating it only jumps back and forth between the latest and before-latest version.

With git-tracking (the default for fresh installs), papers undo and papers redo step through the whole history of the library (-n N steps at once). History is append-only: undo and redo record restore commits in the backup repository instead of rewriting it, so no state is ever lost. In particular, making a new change while undone starts a new line of history on top, and the states that were still redoable remain reachable with further papers undo or with papers restore-backup --ref COMMIT (use papers git log to find COMMIT).

See Git integration for how to enable git-tracking.