KOReader on Kobo Aura One - One Column zoom

I am a newbie in the world of e-reader. I just bought my Kobo Aura One and installed KOReader on it.

I was wondering if it is possible to zoom to fit one column width. I read a lot of scientific pdfs with double column. It would a great option if I can zoom to fit one column with with the landscape setting. I tried one column setting with overflow with KOreader, but the texts were converted and got very messy

Is it feasible? Do I need to install certain patch or add something to KOReader?

Thanks for your tips.