Juniper Allegro CE Owner's Manual page 113

The image shown below is larger than the Allegro's screen. The
arrows on the right side of the image allow you to move it up or
down. The arrows on the bottom of the image allow you to move it left
or right. These arrows give you access to sections of the image that
you cannot see on the Allegro's screen when you open the image.
Once the image is open, there is a small box with an arrow pointing
up in the bottom left hand corner of the image. Tapping on the arrow
accesses a pop-up window with the following options:
Rotate
Zoom
Next
Previous
Close
Rotate
Tapping on Rotate opens a pop-up window with the following
options for rotation the image:
L90 o
R90 o
180 o
Flip horizontal
Flip vertical
Windows CE Page 4-53