Thread: KOReader: a document reader for PDF, DJVU, EPUB, FB2, HTML, ... (GPLv3)
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Old 05-12-2017, 05:11 PM   #1095
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Quote:
Originally Posted by Radeon89 View Post
I tried to open three different pdf files with KOReader but none of the files allow me to change the font size (If I click on the Aa button I see the various font sizes but everything is greyed out). Is this function available in "specific" PDF files only or?
It could be you are looking at a PDF file that is only images of the pages, not characters.
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