Thanks for reaching out to the Community with your feedback! I apologize that being able to control your line spacing is a feature we currently do not have. However I would happy to pass the request for this feature along with the rest of your feedback to the appropriate teams.
To center align a text block, there is the ability to center align wording in the block as well as adding spacing on the left or right side of a text block. As for being able to freely place an image in your email, what exactly where you looking to do? If you were looking to have an image closer to your text, we do offer the ability to wrap an image in a text block. Also, the ability to change color background for individual blocks is something that is available as well. Hope this helps!
Frankie P. Community & Social Media Support
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