Now is your chance to make fun of me!!

[HauptmannMolders]

Think of trimming like zeroing your controls. In any air plane depending on height, speed, wind speed and direction etc the plane will take considerable effort to have it fly straight. By trimming you are setting the stick and rudders to a point where it fly straight in the "zero" position. Hold the stick/rudders so that the plane is flying straight and hit the trim button. When you then let go of the stick/rudders the plane should now fly straight with little or no effort even if you take your hands off the controls.