Step 1 - Adding tracking image in the email (using new email builder)

1. Follow the steps mentioned below OR watch the video version of the same instructions here
2. Add an "Image" block in your email, preferably near the footer area
3. Select "Custom Image URL" as the image source and paste the provided tracking image URL:
   
4. Click on any other element to change focus and then click on the image block we just inserted
5. There will a section titled "Size" with a slider. Drag the slider to the left (minimum size). Even though the image is transparent, we would not want it to take up too much space in the template:
   
6. That's it!