These are the example ?customization= profiles shipped under
platform/app/public/customizations/, grouped by area. Each file is fetched as
JSONC data (never executed) and applied at startup. Tick the ones you want,
optionally pick a viewer theme (added as ?theme=), then launch the viewer or copy
the generated query string onto any viewer URL. Multiple profiles are comma-separated and
applied in order.
See the
customization docs
for how to author your own. The prefix allowlist is set by
customizationUrlPrefixes in the app config.