Assigning multiple styles to a .txt file

Hi all,

I am wondering how to achieve italicizing a given word within a sentence using the style editor and utilizing multiple styles within a given .txt file? I understand how to dictate a given style to an entire .txt file, but not to certain words or phrases within that file.

While we are on the subject, I'd also like to assign a particular style to a given set of words to presented that I have used the "~" function. Would the given style be inserted after the tilda, but before the word (e.g. ~<2>dog) or at the top of the .txt file that specifies the words to be recalled by DirectRT?

Any and all help will be much appreciated.