Once you've anchored it by doing it a few times just a deep breath and a mental intent is all that is required.
Anyway PhotoReading is not done at the alpha level. The only use we have for the alpha level is entering the Accelerated Learning State where we give ourself our positive affirmation and state our intent and purpose.
You get into the ideal state for PhotoReading by entering photofocus. Your mind will be in the right brainwaves within the first 12 pages.
Alex