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A bad paragraph and a character note that quietly drifted off canon are different problems, and Quarkle undoes them differently: chapter History for your prose, Atlas note history for everything the Story Atlas keeps. This guide is about knowing which one to reach for.

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Chapter checkpoints: History

Every chapter saves itself as a series of checkpoints as you write: automatically roughly every 250 words, or manually whenever you name one yourself. Open History in the left rail for a timeline of a chapter’s checkpoints.
The version history timeline next to a diff of added text

The History timeline, with a diff of what changed.

Switch to Restore mode to compare any checkpoint against your current draft, then restore it if that’s what you want.
Restore mode showing the current draft and a checkpoint side by side with a word diff

Restore mode: your current draft on the left, the checkpoint on the right, and the exact difference between them.

Restoring is never destructive. Quarkle saves your current draft as its own checkpoint first, so a restore is always itself reversible.
The restore confirmation dialog explaining the current draft is saved first

Restoring saves your current draft first, so nothing is lost.

Use this when: you want to roll back a chapter’s prose, whether that’s one bad AI rewrite you already accepted, or an entire session’s worth of edits that didn’t work out. Full reference: Version history.

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Atlas note history

Character notes, world notes, Book Notes, Memory, every note in the Story Atlas keeps its own full history, completely separate from chapter checkpoints. Open a note and its history shows just that note’s changes.
The revision history for a single note

One note's history: the timeline filtered to a single note.

Open any past version to read it in full.
A Version 2 page of a note with a Versions breadcrumb

A past version, labelled and dated, under a Versions breadcrumb.

You can restore it outright, or edit it and save as a new version, either way your history is preserved, never overwritten.
Editing a version shows a Save as a new version action

Editing a past version saves it as a new version. History is never overwritten.

Use this when: a character or world note has drifted somewhere wrong, whether from an AI update you didn’t catch or your own edit you want to walk back. This is completely independent of chapter checkpoints, restoring a note has no effect on your prose, and restoring a chapter has no effect on its notes.

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Which one do I use?

A quick way to tell them apart:
The one thing that prevents most “undo” situations before they start: freeze a note once it’s right. A frozen note can’t drift, because Quarkle simply won’t write to it again.

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