As below code copy from a sample tizen native app project. I’ve reading from some topic on the help doc, and konw some basic concepts about the widget layout in EDC file, such as the rel1, rel2, to, offset, align, relative. Did the fixed is oppsite to the relative? But from the sample code, seems it’s not.

         part { name: "bg_rect";
            type: RECT;
            scale: 1;
            description { state: "default" 0.0;
               fixed: 1 1;
               rel1 { relative: 0.0 0.0; }
               rel2 { relative: 1.0 1.0; }
               color: 0 0 0 255;
            }
         }