The new user interface no longer uses the logo variables as in the classic interface.  These variables [[logo-link]] and [[logo]] can be replaced with an actual image uploaded directly from the interface.  

To include a logo in your templates, select the template you want to edit and select the "image" icon along the top of the editor tool bar (it will look like a landscape icon, next to the paper icon).  From here you can upload any image, and this can be different for every message and can be resized.

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