Preferences

File › Preferences… (Ctrl+, or ⌘, on a Mac; also in the command palette) opens the preferences. The sections are listed on the left (on phones the dialog fills the screen) and the search field finds a setting by name:

General: the language (follow the browser, English, 日本語, 简体中文 or 한국어; the page reloads to apply it) and the UI scale (80–150 %).
Appearance: the colour theme of the whole interface, picked from cards that preview each palette and apply at once: Ikimotion (default: dark ink with a lime accent), Slate (the earlier dark slate and cyan look), Light (light neutral with a green accent), Sakura (dark plum with a pink accent) and High contrast (black and white with a yellow accent). Every theme keeps text at WCAG AA contrast or better. The palette also switches themes (type theme). The viewport background keeps its own setting under View; selection outlines in the viewport take the theme’s accent.
Tools: soft selection, snapping, mirror editing, warp and automatic-mesh defaults, the selection brush.
View: renderer, editor background colour, grid, display quality and other view options.
Preview: settings of the runtime preview.
Workspaces: the stages and custom workspaces, and the initial layout (see Stages and workspaces).
Keyboard: the shortcut set (Ikimotion keys or Cubism-compatible keys), customize shortcuts, export and import the active set, import Cubism Editor shortcut files.
Dialogs: every dialog whose “don’t ask again” choice is remembered; Show all dialogs again brings them back.
Panels: Restrict drag and drop in the Outliner and the Parameters panel.

The Preferences dialog on its General section with the language, UI scale and device layout.

The Keyboard section of the Preferences dialog with the shortcut customization and import and export buttons.

All preferences are stored in this browser only: nothing is sent to the server or saved in the project, so every collaborator keeps their own. Clearing the browser’s site data resets them.