Customizing Zapier output to Facebook?

I use a very simple Zap to push select content from Ghost to a Facebook group. It works flawlessly but I’d like to be able to customize the format/look of the post. I can sort of see steps in Zapier to do this, but I don’t understand what I need to do (sorry, this is a zapier question not a ghost question).

Here’s an example of how a post looks when it’s pushed.


I’d like to make the post title bigger and throw a line break between the title and the content text - here’s one I manually edited after it was posted:


I know that’s a minor change but I feel like something of the sort should be achievable in Zapier, right?