You can use the proposed "Type" property.
As far as I'm aware, you possibly cannot customize further, as this is actual code proposed from/by Twitter that is only interfaced in Construct.
Although, in the end, this is HTML, so perhaps you could customize it using CSS making use of the IDs of the elements, as displayed in the page on execution time. This sounds kind of a hack though, and is outside of the scope of Construct itself.