Pentax ist - Manual (Page 136)

134
CUSTOM FUNCTIONS
Basic Setting of Custom Functions
Follow the procedure below to set a custom function.
1
Set the mode dial to .
The custom function number and
setting number will be displayed
on the LCD panel.
2
Use the four-way controller
to select the
custom function number
you wish to set.
The custom function number will
be changed.
Custom function number
Setting number