20. Command-line options (the useful ones)

Option	What it does
`--data-dir <folder>`	Keep settings, projects and logs in this folder (portable use, testing).
`--theme <id>`	Start with a theme: azure, dark, steel, light, high-contrast, graphite, olive, umber, pine, …
`--lang <code>`	Use a translation if one is installed beside the app.
`--settings-page <page>`	Open Settings on a page (appearance, audio, instrument, midi, export, about).
`--export-one-shots <folder>`	Write the royalty-free one-shot library as files.
`--screenshot <file>`	Save a picture of the window and quit.

There are also many --demo-* switches (used to build the screenshots in this manual and the project's interface sweep); nebula --help lists them all.

Updated 2026-11-02