Originally Posted by hama
Thank you so much, but I do, as you see, I canīt change the size of the letters.
What format file? PDF? ePub.
PDFs, as a rule, don't allow font-size changes. Instead, PDF viewers offer zoom factors that magnify the pagy.
*Some* pdfs allow you to ignore everything but text and "reflow" it on a page by page basis.
PDf is an electronic paper format, not an ebook format like ePub, so there is a limit to what you do with it.