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Manual

This manual assumes you have never used a Markdown editor and would rather not learn one. Which button, and when, is written down.

How to use it

Folding Mirror isn't a tool for hackers. If you can use a notes app you can use this — the pages below break every task into actual steps.

Step oneInstall itThe installer isn't out yet. For now you can write on the sheet on the front page; it is the same editor you'll install.Step twoPoint it at a folderNothing is imported or moved. Whichever folder you choose is the folder whose .md files it looks after — uninstall it and every file is still there.Step threeJust writeYou don't have to learn Markdown first. Type a couple of words: headings, bold and lists all have a way that needs no syntax.
Getting started

01Opening it for the first time

Install it, point it at a folder, learn the four areas of the window, then write your first paragraph.

installblocked on first launchwhat a library isnew documentsaving
Writing

02Writing

Write without memorising Markdown: when the marks fade, when they come back, and three ways to apply formatting.

live previewheadings and boldslash menuright-click menufind and replacefocus mode

03Images, tables, formulas and diagrams

Drag an image in, edit tables in place, write formulas between dollar signs, and keep diagrams and sketches as their own files.

insert imagetablesLaTeX formulascode blocksMermaid diagramsExcalidraw drawingstask lists
Library

04Your library, and finding things

Folders, several libraries, tabs, search, quick open, the outline, wiki links and mentions — and what each of them looks like on disk.

new folderswitch librarytabssearch the libraryquick openwiki links [[ ]]backlinks

05Version history

Checkpoints happen while you write. Go back to a version of this document, or take the whole library back to a moment in time.

recover a deleted paragraphcompare versionslibrary-wide checkpointsrestorewhere backups live
Assistant

06The AI assistant

Set up an API key from scratch, then let the assistant read, edit, draw and work the app itself — it asks before it touches your files.

API key setupchoosing a modelapproving editsworking the appskillsMCPcontext usagecost
Publishing

07Exporting and publishing

PDF with the fonts embedded, HTML as one self-contained file, and the shortest route of all: handing over the .md itself.

export PDFtofu boxesembed fontsexport HTMLhand over the .mdwhat gets left behind
Settings

08Settings and shortcuts

Interface language, three separate fonts, body size — plus the full shortcut table, every row of which you can rebind with one click.

change fontschange sizeswitch languagerebind a shortcutfull shortcut table

09Common questions

Won't open, files missing, formulas not rendering, the assistant erroring — check here first.

won't openwhere did my files goformulas not renderingassistant can't connectuninstallwhere the data lives
Not installed yet

Reading this far, you may as well write a line.

Write in the browserSee what it does

The sheet on the web page is the app's own editor, not an imitation.