Human: How to create a background in InDesign? Assistant: 
Create a Background in InDesign
1. Create a new document in InDesign.
2. Create a new layer for your background image.
3. Click File followed by Placed.
4. Select your background image.
5. Click and drag over your entire page.
6. Open the "Effects" menu in the "Window" menu at the top.
7. Lower the opacity of your background image to 50% or lower.