SciTE is very nice little text editor. I constantly use it, but it's default layout settings are not good for me. However, it allows to create, so called User Option File (/home/me/.SciTEUser.properties) and adjust it to user's preferences. This is what I have in this file:
split.vertical=0
line.margin.visible=1
line.margin.width=4
position.width=650
position.height=920
output.vertical.size=175
With these settings the editor looks as follows: