Office challenge: Why is Word displaying graph paper?

In this week's challenge, help a Word user who's seeing graph paper! Where did they come from and can you help him get rid of them?

Here's a fun one and the solution is so simple! Well…it's not so much fun for the confused user, whose copy of Word is suddenly displaying graph paper instead of the nice blank sheets the user's familiar with. What happened and can you help this user get Word back to normal?