You have the possibility to add images in the template editor.
Here's how to do it:
In a block of text, select the images icon:
A new window will open. Here you have the choice to add your image from a link or to upload a file.
Once the image is added, you can change its size directly in the window or in the text box:
Once saved, you can still change the size of your image or other parameters such as the border, etc...
And voilà!
Note: If you decide to upload your own files, the images will be hosted on our servers.