Rick, CSS has a great presence and future within Xara design - I use it in lots of areas where interaction events are used.
I don't know how you would use typeface support, other than using CSS.
I would put
Code:
<style>
html, h1, h2, h3, .Normal_text {
font-family: "Arial, Tahoma, sans-serif
}
</style>
into the Website > HTML Code (head).
I would carefully check how the text fitted.
However, I would use @font-face with my preferred font instead as this ensure the font is rendered even if it is not on the customer's browser.
It would usually be fine with headings. For paragraphs of text, i would allow some space on the right for overruns.
To change a style you apply it to some text, change the text to what you want and then update the style.
As paragraph styles are based on the underlying style (here, you pick Normal), it should work the way you are after.
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