Scribing A Cabinet Filler
Scribing a cabinet filler to fit the wall is done with a compos, belt sander, saber saw, skill saw or hand-plan. As the image illustrates, the cabinet filler is held tight to the wall and then you draw your line onto the wood scribe by following the shape of the wall. This is done to make the wood fit tightly tp the wall that the kitchen upper or base cabinet is being installed against.
For more information on how to properly scribe fit a kitchen cabinet filler go here: How To Attach Fillers On To Cabinets