You can easily adjust how many prompts each project track should have in the Projects tab using the project table.
To do this:
Navigate to the Projects tab and locate the project you want to adjust.
Click the box next to the active prompt (in the “Active / Max Prompts” column).
Enter a new value that is allowed within your credit limit.
Click anywhere else on the screen to save the changes.
If you are a brand, then you have a fixed amount of prompts that you can allocate among your projects. If you are an agency, then you will have a set pool of credits that you can use to determine how many prompts you can allocate to each project.