# Custom Settings

Customize how Luciq behaves and appears: user identification, custom data, and SDK UI (welcome message, prompt options, theme, locale).

* [User Identification](https://docs.luciq.ai/kmp/setup-luciq-for-kmp/custom-settings/user-identification) – `identifyUser`, `logOut`
* [Setting Custom Data](https://docs.luciq.ai/kmp/setup-luciq-for-kmp/custom-settings/setting-custom-data) – `setUserData`, `setUserAttribute`, `setAppVariant`, tags
* [SDK Customization](https://docs.luciq.ai/kmp/setup-luciq-for-kmp/custom-settings/sdk-customization) – Welcome message, prompt options, UI color & theme, locale