It would be REAL handy for me to have the gizmo project 4:5 crop marks on the sides.
According to the dpreview preview (page 12) you can specify different aspect ratios of 6:6, 3:4, 4:5, 6:7, 10:12 and 5:7. One would hope that the "gizmo" (as you refer to it) would project grid lines for those ratios (but I didn't see any evidence of that).
Wes N.