SumatraPDF's stable version was updated sometime in 2016. But, there's an easy solution for this as well.Įven if the document does not display perfectly, you may still use the feature to copy the text that you are interested in before you restore the preference to its default value. I tested this with some free eBooks from Gutenberg and some textbooks, and the latter had some issues. If your ebook does not contain a lot of CSS formatting, it should work perfectly fine. So, when you force the change, it renders it in HTML and the CSS style elements which aren't supported are broken. That's because the program doesn't support XHTML completely (ePub is based on HTML).

It breaks the document's formatting, but the extent of it depends on the ePub.

Load the ePub document again in the program, and it should now have text that is selectable and searchable. Save the document, close SumatraPDF and re-open it. Change the value from false to true, so it should read UseFixedPageUI = true.Ħ. Look for the line which says UseFixedPageUI = false.

Sumatra ebook reader