Sometimes what is needed is some elbow grease to accomplish a specific look in an email. You can combine the simplicity of the email designer with some custom HTML/CSS if you want to with the raw HTML component.
If you do not know what this means, how to do it, or what tends to work/not work in email clients this is probably not the component you are looking for.
User Raw HTML Component
This component can be used for specific image sizing needs, integrating with some third party capabilities, or anything that requires specific CSS or HTML.
To use this component just drag it in and edit directly. To see it render you will need to preview or test send.