Release 10.1A: OpenEdge Development:
AppBuilder

SIZE-TO-FIT setting

The SIZE-TO-FIT setting works only for the initial call to the master layout. In fact, when you change layouts, the width/height of the frame that you see is the design size, not the initial SIZE-TO-FIT size; that is, there is a margin on the right and bottom, even if you choose to set the layout to the master layout.