Devexpress Reporting: How to Control Parameter Field's Width?

Question

I'm using Xtrareports for reporting.

There is a paragraph that a part of it is coming from a parameter.

Let's say "Dear [USERNAME] welcome"

You see, I wasn't be able to put [USERNAME] into a paragraph. So I did it like: "Dear" [USERNAME] "welcome".

But now, if the username is short like "ab", it looks like: "Dear ab____ welcome".

If it's longer like "qwertyasdfghjkzxcvbnm", it looks like: "Dear qwertyasdfgwelcome".

How can I do this in a XtraReport file? Like a label control in Asp.net: "Hello" + USERNAME.ToString() + "welcome";