Text Formatting ⇒ Problems with a text format command

[AMpeLIos88]

I am nex to LaTeX and I am feeling my way through the code. I came across the problem of changing the font in certain areas of my document. I found the solution online:
http://tex.stackexchange.com/questions/ ... y-document

The solution of my problem is the creation of a macro with this line of code:

Code: Select all

\newcommand*{\myfont}{\fontfamily{<familyname>}\selectfont}

The problem I have is how to write the code exactly.

Suppose I want to use the fontfamily: Serif Fonts and the font: Garamond Expert with Math Design, then how is the code supposed to look like?

I would appreciate it if you could help me out.