Set Left Margin on HP printer

[gilloz]

I have an HP LaserJet 4L printer that I've had since day one. Up until a couple of weeks ago, I've never had any problems with it. Now, for some unknown reason, the 1 inch Left margin is gone and my documents print about 1/4 inch from the edge. This makes it difficult to use a 3 hole paper punch, for obvious reasons. Anyone know how to reset the Left margin back to 1 inch?

Added info: Sorry. Disregard this post. I believe I know what the problem is.