Email template allows you to add Images and marketing material using HTML. However, you just need to know some HTML.

1- In Chargezoom, go to the Configuration Tab and select Email Templates

2- Select the Template you want to modify

3- In the Email Body, Click the icon for Source  

4- The <HTML> source will appear 

5- Now, you can insert an image in HTML and Customize your template

6- Use the image tag and include a source and alt attribute. Like any other HTML element, you’ll add images to the body section of your HTML file. The syntax looks like this: <img src="URL" alt="descriptive text"> 

7- You will be able to click on the preview icon to check the alignment

 8- Click Save 

Here are some reference websites on how to add images on HTML: