When using creative dimension filtering, what steps must be taken to generate dynamic previews correctly?

1. Enter the creative sizes as comma-separated values, select the corresponding creative sizes, and click “Apply”
2. Enter the creative size and click “Apply”
3. Enter one creative size, select the creative for that size, and click “Apply”
4. Select all creative sizes and click “Apply”

Correct Answer:

• Enter one creative size, select the creative for that size, and click “Apply”