Nikon D300 User Manual page 766

with the external flash units during the monitor pre-flash
cycle.
Always position the sensor windows on the external
Speedlights where they will pick up the monitor pre-flashes
from the built-in flash. Take particular care when not using a
tripod.
Commander Mode Settings
Basically, the
will display the selections listed below. Use the
Selector to change the values, as shown in
are the Mode settings:
▪ TTL, or i-TTL mode
▪ AA, or Auto Aperture mode
▪ M, or Manual mode
▪ --, or double-dash mode (what else would one call it?)
Figure 12-11. Mode options
Mode fields on the
766
Commander mode
Figure 12-11. Here
screen
Multi