I cannot write in a straight line unless I have lined paper to help guide me along the page. However sometimes the task calls for plain paper where no such lines are in place (i.e. a poster or some such).
I usually write with a ball point pen. However, in the case of a poster, I use felt tip pen which is more susceptible to smudging if rubbed too much / too soon!
How can I make sure that I am writing in a straight line without using lined paper?
I have tried placing a ruler along the page but this messes up my handwriting and it looks a bit weird so I would rather try a new method.