Local files · Presentor

Source shows the same document as Markdown and explicit object attributes.

Open file reads .pre projects and .md documents. Save As asks for the format before the name and destination.

Save As distinguishes a project file from Markdown before choosing the destination.

Presentor project: a single .pre file containing Markdown source, speaker notes and attachments. Use it to carry a presentation with media.
Markdown document: readable .md source with attachments embedded when saved. Large media make the source file larger.

Open project folder provides access to referenced attachment paths; this requires the browser's File System Access API.

Save writes back when a writable handle exists. Otherwise, choose a file name and location. Browsers without the native file picker use upload and download.

Single-file documents embed attachments, which makes them portable but larger. Project folders can store files in assets/. Use a cloud copy to continue on another device.

Canceling save leaves the document marked as unsaved. Opening, creating or closing a document with pending changes asks how to preserve them.

Historical files keep their existing text behavior. New sizing and dollar-delimited formula editing are not applied as a bulk migration.