I have always used a graphite stick to transfer lettering. In a search for diy signs I saw someone using chalk. Chalk is so much easier. It makes a soft bright line that doesn't get in the way of oil paint pens and easily brushes off when done. Easy Peasy!
Just print out your words, flip them over, rub the back of the paper with chalk, trace, apply paint pen. Brush chalk off or leave it for effect.
Used oil pens because the chalk pen rubs right off and I don't plan on changing these. Wood sign boards & easel purchased at Target .30 cents on clearance.