Does Preview have a Read Out Loud function?

Hello AAzevedo71,

Thank you for the question. I recommend enabling "Speak selected text when the key is pressed" in your System Preferences so that your Mac will read back the text in Preview.

Follow these steps:

If you have trouble reading text on your screen, you can have your Mac speak text that’s on the screen when you press a key or set of keys.

1. Choose Apple menu > System Preferences, click Dictation & Speech, then click Text to Speech.
2. Select the “Speak selected text when the key is pressed” checkbox.
   By default, speaking is enabled when you press Option-Esc. To choose a different key, click Change Key, press one or more modifier keys (Command, Shift, Option, or Control) together with another key, then click OK.
3. To have your Mac start speaking, press the specified key. To stop the speaking, press the key again.
   If text is selected when you press the key, the selected text is spoken. Otherwise, available text items in the current window are spoken; for example, if Mail is the current window, an email message is read. If no text items are available, you hear a beep.

You can view the full article here (the title of the article refers to Mavericks, but the steps apply to Mountain Lion as well):

OS X Mavericks: Hear your Mac speak text

http://support.apple.com/kb/PH14230

Thank you for using Apple Support Communities.

Best,

Sheila M.

Hi AAzevedo71,

I'm glad I could help. Have a great day!

All the best,

Sheila M.