3D FlipBook - Resolution Of Type Not Razor Sharp

I just purchased your Pro version of 3D FlipBook. Prior to this, I used the Light version for the past few years. Everything is superb except one area that needs slight adjustment. The type in my publication is not as razor sharp as it has been in previous Light Versions (now pro version). Is there any setting that I can change that will make the type razor sharp once again when you make the page larger with the plus tool? I read something about "magnification coefficient of auto resolution" in one post while searching for an answer. If that is it, what number or numbers should I use? Or if I am barking up the wrong tree, explain how I can achieve sharper text when the page is magnified with the plus tool. I am trying to give our readers a great reading experience with razor sharp type. Thanks so much.