- Macula - Selects the macula as the location to minimize dose.
- Optic disc - Selects the optic disc as the location to minimize dose.
- Show % exposure... - when checked, overlays each source in the plaque loading window with its % direct exposure (estimated as line of sight visibility) to the optimization reference point when lip or slot collimation is enabled.
- Rx plaque - Selects the currently designated Rx plaque as the one to optimize.
- Plaque # - Selects any of the 4 possible plaques to optimize.