I've been trying to formulate a question for quite some time, and I haven't been able to come up with a better way to describe it. I hope it's not too confusing.
There are a number of ways to use markup languages to convey information like emphasis in text files. Stack exchange uses 'Markdown' for example. In this case, adding
* (in Markdown) or
<emph> (in HTML) is simply called 'markup' I suppose, but is there a name for this? That is, making something stand out in the text, be it logically like "emphasis" or explicitly like "bold" or "underline", etc. The only thing that comes to mind is to emphasize, but (to me at least) that implies stressing the word, not what you're doing with the text to achieve that result.
This has been bugging me for quite a while, I hope someone can help me out here.