1. Use large fonts: Using large fonts can make the text more clearly displayed, and at the same time fill the space of the light box to avoid blank space.

2. Make a multi-page poster: If the light box area is large, the poster can be divided into multiple pages for design, so that each page can display the content separately and leave space on the whole poster.

3. Add background patterns: Add some striking background patterns behind the light box to make the light box more attractive.

4. Change the direction of the text: It is also a good method to arrange the text vertically or obliquely along the background pattern, which can make the typesetting more beautiful.

5. Add color: Adding some bright colors can make the light box more eye-catching and improve the visual impact.