Mods and Admins can to the following to change a member's warning level:
Click the members profile button below their post and you will see in the bottom right, the ability to modify the warning image as you can see in the screen shot below. Click on the image that you want to give the member.
Click the members profile button below their post and you will see in the bottom right, the ability to modify the warning image as you can see in the screen shot below. Click on the image that you want to give the member.