How to increase the space between lines in Calibre reader?

Question

I prefer the Calibre ebook reader to any other but I find one limitation: there is no obvious way (GUI) to change the space between lines.

I have found various solutions but these involved editing the ebook itself, or using CSS styles that didn't work.

Answer 1

Indeed there is no GUI option in settings for that in version 6.6.1.

The way to do it is to add a manual/text setting in Preferences - Styles, like this:

body 
{
   line-height:2.0em !important;
}

as said here.

The important variable in the example here is the numeric part: 2.0. 1.5 can be used etc.