Superuser..add lines or make it easier to see which User right I am dealing with

Superuser..add lines or make it easier to see which User right I am dealing with

Hi
When I am trying to setup a new staff member on d6 I have great difficulty in seeing which user right I am setting as there is a lot of blank space between the item and the setting on my wide screen. Even when I reduce the size of my window ...it is not easy to make sure I am changing the correct setting...is there any way to put lines to make it easier to see which line is which? I am attaching a screenshot to show you what I mean.

Many thanks