[stormproof]

Hi, I'm new to Calibre.
I publish (on a very small scale) out of print and classic out of copyright books, and make them available on my website.
Recently I've committed to making the texts (currently pdf) available as epub, and so I've converted a few.
When I view the converted file in the Calibre e-reader, shrinking the page and/or enlarging the font (to mimic what would appear on a smartphone) makes the lines overflow, rather than flow together - see attachment.
Is it possible to make the lines flow together?
Many thanks.