How can I adjust the font size of .pdf files via the iBook app?

[iMore Question]

Hi, my iPhone has the latest OS as of this morning. There is. I place to chane the font. What to do as the font is maybe 2 ponts. Thanks

 

[Just_Me_D]

I have an iPhone 5c. I am trying to read PDF's in iBooks but it let me adjust...

Well, based on what I *think* you're trying to convey, I suppose you can choose to increase the size of the font to your liking. If you're asking *how* to change the font, the information via the following links may be helpful to you.

http://www.imore.com/how-adjust-reading-settings-ibooks-iphone-and-ipad

Having said that, I'm under the impression that you can't increase the font size of .pdf documents via iBooks, but I could be wrong, and I can't say whether or not the link I provided above will work with .pdf files.