Rock Kasbah - 2017-11-24

First of all, thanks for this great software!

I'm using Cool Reader on Windows 10 x64. I have made all the changes I want to my liking, except for one. I am reading Epubs, in Fullscreen mode, and I have changed the settings so that the display is in scroll view (not one or two pages). I want to increase the margins on the right and left sides. I have already set them to the maximum of 9.99% but still the text covers just about the entire screen from the left to the right. I want about three inches on both sides so that the text is in the shape of a column in the middle, in scroll mode. Something like how the text is displayed on this page. Are there any settings that can be changed for this?

Please help.