For this, Markdown is used, a format that is used in digital writing to enrich texts. For example, this blog and many more like iPadizate , Xombit or Andro4All use it. But let's go to the point. To make bold you must type 2 asterisks before and after the word or phrase. So a simple 'applesencia' becomes applesencia , which is more cool.
For the italics we will put the word between low scripts so that it comes out like this, in essence . Finally and if you want to put a crossed-out word, you have to place it between virgins, that is, "el rabito de la ñ", which is ~.