Nikon D3000 Reference Manual page 54

The following operations can be performed while the guide menu is displayed:
To
Highlight
options
Select
highlighted
option
!
Return to
previous
display
Return to top
level menu
View help
36
Use
Press 1 or 3 to highlight options in the guide menu.
Press 1, 3, 4, or 2 to highlight
options in displays like that shown at
right.
J Press J to select the highlighted option.
Press 4 to return to the previous display.
To cancel and return to the previous
display from displays like that shown
at right, highlight & and press J.
Press G to return to the top level of the guide menu.
G button
If a d icon is displayed at the
bottom left corner of the monitor,
help can be displayed by pressing
the Q (W) button. A description of
the currently selected option will be
displayed while the button is
pressed. Press 1 or 3 to scroll
through the display.
Q (W) button
Description
d (help) icon