16:9: Brings up the 16:9 Frame Guide.
1.91: Brings up the 1.91 Frame Guide.
4:3: Brings up the 4:3 Frame Guide.
1:1: Brings up the 1:1 (Square) Frame Guide.
4:5: Brings up the 4:5 Frame Guide.
9:16: Brings up the 9:16 Frame Guide.
Menu Icon: Provides quick access to the last Menu you've previously had open.