To delete an image from the image library you need to have an appeal mailing or acknowledgment letter set up in your database. 

To delete an image from the image library through an appeal mailing

1. Click Marketing and Communications > Appeal Mailings
2. Click on a mailing that contains a letter > click on the letters tab
3. Click the arrow next to the letter > click edit
4. Click edit in the write your letter's content section 
5. Click on the insert image icon > click on the image > click the red x

To delete an image from the image library through an acknowledgment letter

1. Click Marketing and Communications > Acknowlegments
2. Click the arrow next to a letter > click edit
3. Click edit in the write your letter's content section
4. Click on the insert image button 
5. Click on the image > click the red 'x' to delete the image