Lumen Darkroom Guide

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Lumen Guide

Darkroom Guide

Lumen

A private darkroom for Mac, iPad, and iPhone. Every edit stays reversible, and the original photograph is never touched.

Reversible .lumen documents
Extended-range Display P3
Film looks and LUTs
Atelier colouring studio

Start with the basics

Last updated 17 October 2026

Browse the guide

12 articles

Welcome to Lumen

Getting Started with Lumen Understand Lumen's non-destructive edit model, on-device privacy guarantee, and reversible layers.
A Quick Tour of Lumen Tour the unified darkroom interface across Mac, iPad, and iPhone.

Workspace & Navigation

The Workspace The main editing canvas: Surface Bar, Canvas Viewport, Tool Wheel, Lower Ribbon, and Layer Stack.

Adjustments Ribbon

Film Looks & LUTs

Film Looks & LUTs Amber Hour, Sunlit Porch, Apricot Haze, and the rest of the Film shelf.

Retouch & Spotting

Spotting Hold Space. MOVE is V, the brush is B, and a repair stays on a layer above the original.

Layers & AI Selection

The Layer Stack, AI Select & Masks Work with non-destructive paint layers, clipping masks, blend modes, and one-tap AI subject selection.

Lumen Atelier

Atelier The Atelier guide card: click a facet, hold Tab for the media wheel, Command L back to the darkroom.

Delivery & Reference

Release Notes

Release History The Lumen tag history across Mac, iPad, and iPhone.