[ondrejandrej]

Thanks a lot, that works. In my version it's the Mantano icon on the left of the green bar with the book title.

I have one more problem, though: Mantano hyphenates words in books, and it does so wrongly, so I'd like to turn it off. I had the same problem with FBReader, but there you can easily turn it off in View settings. I didn't find such option in Mantano.

The thing is, in my language (Czech) you cannot hyphenate a word anywhere you like. You have to keep syllables in a whole. The only proper way to do this in software is to load hyphenation patterns (a file with all the words with possible hyphen positions indicated).