The 
standard plate (sometimes called a curtain 
              or drapery plate) fastens with screws to the base of the machine. 
              The material that is to be ruffled goes over the top the plate and 
              the material that stays flat (called the flat panel) to which the 
              ruffle is attached goes under the plate. Because of the location 
              of the screws, the ruffles can only be sewed close to the edge of 
              the flat panel . 
              
              
              
               
              On the other hand, the optional 
dress plate does 
              not attach to the base but is mounted on long rods that hinge from 
              holes in the upright part of the machine. This gives much more room 
              for the flat material and allows ruffles to be attached farther 
              from the edge of the flat panel as would be necessary in sewing 
              ruffles in tiers to a dress. If you buy the optional dress plate 
              you also get the standard plate. 
              
              
 
              The user can install either plate on the machine depending on which 
              is required. ( the standard plate does have the advantage of being 
              a bit more rigid than the dress plate, so if you are not doing ruffles 
              far from the edge you would probably want to use the standard plate. 
              ) The machine can also sew ruffles without attaching to a flat panel.