Pentax K-5 Operating Manual page 167

Select the folder you want to
display.
The number of images saved in the
selected folder appears at the top right of
the screen.
12345
NN
Available operations
Four-way controller Moves the selection frame.
(AT _P,)
"_ button Deletestheselectedfolderand all the imagesin it. (p.252)
Press the
OK
button.
The multi-image display screen for the selected folder appears.
Images will be grouped and displayed by the shooting date.
1
In the multi-image display
screen, press the INFO button.
The [Multi-img Display Setting] screen
appears.
2 Press the INFO button again.