Thick Underline or Shape Possible Behind Text?

[reelhorse]

Is it possible to customize header text to have thick underline or rectangle behind certain words? See below for what I'm referring to (the red). 

[Asad-Mahmood]

What's your store url ?

[reelhorse]

https://igmdhr-kf.myshopify.com/ Still very much in the beginning stages. I'm using PageFly to build. Password: yuhamu

[EstherBui]

Hi @reelhorse 

Can you share with the store link URL and which section would you like to edit please? 

Thank you. 

Esther