Nikon D70 Manual page 158

Custom Setting 16: AE Lock
This option controls whether exposure locks while
the shutter-release button is pressed halfway.
Highlight AE Lock in the detailed CSM menu
( 135) and press the multi selector to the right.
Press the multi selector up or down to highlight
an option, then press to the right to make a selec-
tion.
Option
AE-L button
Exposure can only be locked by pressing AE-L / AF-L button.
(default)
Exposure can be locked by pressing AE-L / AF-L button or by pressing
+Release bttn
shutter-release button halfway.
Custom Setting 17: Focus Area
By default, the fo cus-area display is bounded by
the four outer fo cus areas so that, for example,
press ing the multi se lec tor up when the top fo cus
area is se lect ed has no effect. Fo cus-area selec-
tion can be changed to "wrap around" from top
to bottom, bottom to top, right to left, and left to
right. Highlight Focus area in the detailed CSM
menu ( 135) and press the multi selector to the right. Press the multi se-
lector up or down to highlight an option, then press to the right to make a
selection.
Option
No wrap
Wrap-around disabled.
(default)
Wrap Wrap-around enabled.
148
16 AE Lock
?
Description
17 Focus area
?
Description
OK
AE-L button
+ Release bttn
No wrap
OK
Wrap