I drew lines using the line segment tool. . Then i did ?SOMETHING? by accident and this (the pink) was the result. Anyone able to tell me how to do this again?
I’ve attached a small section as an example.
Group the paths and add a new stroke to the group via the
Appearance Panel. Then drag the new stroke below the
<contents> in the panel.
Group the lines… then add a stroke to the Group via the Appearance Panel… then Move the stroke below the
<contents> item in the panel
Source : Link , Question Author : natalie , Answer Author : Scott