If you wanted to make it parallel you could just copy it and move it up or down, right?

Grab the paintbrush and make a left click somewhere on the page. Now before you click again hold down the ctrl key, move your mouse cursor to another location and then left click once. You should see a line appear between your first left click and you last one.

Bushi is correct too. 
A lot easier than what I'm suggesting, but it really depends on what the circumstances are.

Hope this helps.

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