The American History AP test is tomorrow. So I downloaded a .pdf file from Collegeboard with some sample questions on it. But when I open it up in adobe photoshop 6.0 it comes out very blurry, and there is a checker pattern of white and gray over the whole visible page. How do I get rid of this so I can read the questions?
Also, I downloaded a .pdf of AP Physics B questions for next week, but I can’t even open it because: