Nikon D300 User Manual page 41

Image Quality and Size
Press the QUAL button and rotate the command dials.
Set image
quality
(pg. 57)
QUAL button
Choose an image
size (pg. 60)
QUAL button
ISO Sensitivity
Press the ISO button and rotate the main command dial.
Set ISO
sensitivity
(pg. 94)
+
Main command dial
+
Sub-command dial
+
ISO button Main command dial
Control panel
Control panel
Control panel
X
15