Is their a way to change the font in some of the words of your text without changing the font of all the words? Right now is I want to change the font of a few words I have to quess at the amount of space I will need to insert a word in a different font.

Example:
A smile happens in a flash
It's memory last a lifetime!

to make the words smile and memory stand out I would change those two words in a script front.