Pentax MX-1 Operating Manual page 134

Holding the zoom lever turned to the right (5) also changes the
magnification continuously.
You can use the guide mark "+" that
appears at the bottom left of the screen to
check which portion of the image is
magnified.
Available operations while an image is
magnified
Four-way controller
(2345)
3
E-dial to the right
(y) / Zoom lever to
the right (5)
E-dial to the left
(f) / Zoom lever to
the left (6)
d/i button
3
Press the 4 or 3 button.
The image returns to single-image display.
Movies cannot be magnified.
132
Moves the position to be
magnified.
Makes the image larger
(max. ×10).
Makes the image smaller
(min. ×1.1).
Displays the center of the
image.
Guide
2.0 2.0