@user99895 Thank you so much for your feedback regarding the styling experience within the editor!
To set global styles in your email, you can do this by going to the DESIGN tab in the email editor. Here you can control styles like backgrounds, borders, fonts and buttons. If you set you styles here first, it will be applied to the entire email. Here is an article in our Knowledge Base that goes over how to do this in more detail.
Currently, you are correct, the DESIGN tab only supports Heading 1. This is great feedback and we'll try to get H2-3 in there as well, in the future. This will allow you to select H1-3 in the dropdown within the text editing toolbar and have those styles applied. If you have not already, I also recommend adding your brand to BrandKit! This will save your branding and apply it to pre-branded templates for you. These branded templates are available in your template library.
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