Styling Content In Email

Hi

Love your plugin, saved me a lot of time.

Just have one question, where can i style your options/fields in the emails that gets sent to the user (Whether they complete a tranaction or something.

I know this is not part of your plugin, but the data created is. Where or how can i style this to fit.

http://snag.gy/e6rwH.jpg

https://wordpress.org/plugins/woocommerce-extra-accounts-fields/