Originally Posted by John F
So your saying that i can have fixed tighter line spacing OR changing it through the GUI, but I can't have both?
Correct. I use 1.1 in my stylesheet for body text and 1.2 for headings and other non-body text. I also tend to use one font for all my reading so I don't run into the different appearing line spacing with different fonts. Margins are also set in the stylesheet. the Kobo slider will let you increase the left/right margins if you wish to do so.