So, I decided to go with the Courier New font offered by Microsoft Word in writing my provisional patent. I am assuming that is the same Courier font suggested by the UPSTO? Anyway, I have written a full page and decided to export it to PDF. I have used the Foxit PDF reader and the document looked identical to the word document. Though, when I opened it using Adobe Reader which I am told is the software used by the people at USPTO the font was really thinner. It is readable but it is half the font weight of the Microsoft Word document. Should I be concerned how the text looks like in my provisional pdf file? I picked the courier font to be easy on the eye for me and the people who will read the file. Must I switch to another font? If I go with courier new font, will that affect my application in any manner?
It honestly doesn't matter at all. Nobody is going to look at your provisional. Or at least, not until you are trying to litigate a later non-provisional, but then the font choice is the least of your concerns.
As long as the text in your provisional is readable (and even the irritating-to-the-eye Courier New is readable), you'll be fine.