You use your regular foot (it's labeled A or F here, but you can check your manual to make sure) to piece stuff together. Your 1/4" guide foot may be very accurate for sewing two pieces together, I have a Brother, and a Janome (feet are interchangeable) and did the test, and mine was.
Your walking foot is used to help keep the pressure even from above when you are feeding thick fabric through. The feed-dogs must be up, or in normal setting. They are that way from the factory.