The darkroom surrounds the center image with a left panel of peripheral tools, a right panel of image-processing modules, and a bottom toolbar of visual-assessment overlays. An optional filmstrip (Ctrl+Shift+F) can be shown along the bottom for quick navigation through the current collection.

Left panel

Shown and hidden with Ctrl+Shift+L. It holds the peripheral tools that support editing (but do not themselves process pixels):

Navigation
Navigate and zoom the center view via a thumbnail overview. Sits at the top of the panel.
Scopes
A graphical depiction of the image’s tones and colors (histogram, waveform, vectorscope…). The global color picker, used to sample colors from the image, is part of this module.
Snapshots
Take and compare snapshots against the current edit.
Duplicate manager
View and manage the duplicates (versions) of the current image.
Mask manager
View and edit the drawn shapes used by masks.
History of changes
The editing history of the current image, where you can step back to any previous state, compress or reset the history.
Image information
Display EXIF and IPTC information about the current image.
Notes
Free-text notes attached to the image.

Right panel

Shown and hidden with Ctrl+Shift+R. It is dedicated to the image-processing modules: the workflow tabs sit at the top, and the modules themselves fill the rest of the panel.

To inspect or rearrange the order in which modules are applied, see the pixelpipe and module order.

Module workflow tabs

The processing modules are grouped into tabs that follow the pixelpipe, so that editing from left to right (across tabs) and bottom to top (within a tab) walks you through a sound workflow. Hover a tab label for its description.

Pipeline
Lists every module that is currently enabled, in the reverse order of application in the pixelpipe (last-applied on top). This is your overview of what the image actually does.
Basic
Modules that adjust brightness, contrast and dynamic range, work with film scans, and perform color-grading.
Repair
Modules that repair and reconstruct noisy or missing pixels.
Sharpness
Modules that manipulate local contrast, sharpness and blur.
Effects
Modules applying special effects.
Technics
Technical modules that can be ignored in most situations.
All
Every module available in the software.

Reordering modules

Hold Ctrl+Shift and drag a module by its header to move it. Be aware that this changes the order of the modules in the pixelpipe, not just their position on screen — it is best done from the Pipeline or All tab, where you can see the whole pipeline. See the pixelpipe and module order.

Bottom panel

A toolbar of visual-assessment overlays. From left to right:

Styles
Quick-access styles menu. Hover a style name to preview it on the current image.
Color assessment
Toggle the ISO 12646 color-assessment view (neutral surround and reference frame).
Raw overexposed
Toggle raw-overexposure indicators (right-click for options).
Clipping
Toggle output clipping warnings (right-click for options).
Soft proofing
Toggle soft-proofing (right-click for options).
Gamut check
Toggle gamut checking (right-click for options).
Guides & overlays
Left-click to toggle the guide overlays; right-click to change the guide settings, including the color of all on-image drawing (masks, crop guides, etc.).
Pipeline node graph
Open the module-order graph — a left-to-right view of the pixelpipe where you can inspect and rearrange the order in which modules are applied.
Autoset
Run autoset on the chosen modules: each capable module computes its own settings from the image content. Right-click to pick which modules participate.