HorizonOfficial guide
← Horizon Official Guide

HORIZON GUIDE / 01

Meet DSF Horizon

Discover, publish and collect Reads.

Horizon is a platform for discovering, publishing and collecting Reads. A Read is a single piece of content created and published with DSF, from novels and comics to photo collections, travel brochures, public information, manuals and notebooks.

What Horizon does

Horizon connects discovering Reads with creating and publishing them. A Read can be a novel, comic, photo collection, travel brochure, public information sheet, manual, notebook or planner.

Names you will see

NameMeaning
ReadOne piece of content created and published with DSF
ReadsThe plural, also used for lists and categories
HorizonThe platform for discovering, publishing and collecting Reads
DSF StudioThe tool for creating and editing manuscripts
DSF ReaderThe standard environment for reading Reads
WritingHandwriting and annotations added over the original in Reader

Manuscripts, projects, pages, body text and assets still refer to their specific roles. They are not interchangeable with Read.

Horizon menu with entries for Horizon, Studio and Reader and the menu language selector
The shared Horizon, Studio and Reader menu. How to use also opens the official guide. Enlarge image

Publishing that preserves layout

DSF means Digital Spread Format. Its base page ratio is 9:16. Text position, image size and white space remain part of the creator’s expression.

Graphic pages can use WebP images, while text pages can use precomposed fixed text. Reader does not reflow either type to a new line or page layout for the screen width. Zoom and display modes use the original layout as their basis.

Start by reading

  1. Find a Read in Horizon.
  2. Open it in Reader.
  3. For a local file, use Reader’s Open file action.
  4. To add your own notes, use Writing on a supported Read.

Continue with Read a Read and Add your own notes.

DSF Reader displaying the fictional Writing sample
A sample Read open in Reader. The controls on the right include information, Writing and display modes. Enlarge image

Start by creating

  1. Prepare a project in Studio.
  2. Edit and save the manuscript in Editor.
  3. Prepare distribution data in Press.
  4. Issue it to Horizon, then manage its publication status in Reads.

Saving a manuscript, issuing a Read and publishing it are separate actions. Begin with Create a Read.

Two file types

  • .dsfp (DSF Project): an editable Studio manuscript project.
  • .dsfr (DSF Read): for reading, distribution and saving Writing.

Editable Writing files also use .dsfr. They are distinct from .dsfp Studio projects. See Files and format.

Sign-in and your public name

Account-linked actions, including cloud manuscript storage and issuing to Horizon, require sign-in. Current authentication uses a Google account.

If prompted, set up a DSF public profile. The public name shown to readers and creators is managed separately from your Google account name and email address.

Two language settings

The menu language controls application labels. The Read language selects a language variant actually included in the publication.

Changing menus to English does not translate the body text. Reader can only offer languages included in that Read.

Reviewed October 23, 2026. Available features and controls can vary by environment and Read format.

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