루카스 확장프로그램 is a browser add-on designed for lecture mode. It allows users to remove elements from webpages that are not in the "OPEN" state, making it easier to focus on the steps and sub-steps of a lecture.

To get started with 루카스 확장프로그램, simply download and install the extension. Once installed, you can activate lecture mode by clicking on the extension icon. During lecture mode, any steps and sub-steps that are not in the "OPEN" state will be removed from the screen.

In addition, 루카스 확장프로그램 displays a badge in the extension toolbar and a message in the bottom left corner of the screen to indicate that lecture mode is active. To deactivate lecture mode, simply click on the extension icon again.

With 루카스 확장프로그램, users can easily focus on the steps and sub-steps of a lecture without distractions. It is a useful tool for anyone who wants to enhance their learning experience.