Gestetner 10502 Copy Reference Manual page 115

Copying
B
Press the [Combine] key.
2
C
Press the [1 Sided] key for the original, then press the [Combine 2 Side] key for
the copy.
D
Press the [16 Originals] key.
E
Check the orientation.
Note
To change the copy orientation to "Top to Bottom", press the [Orientation]
key, then press the [Top to Bottom] key. If you do not, go to step F.
The default setting is "Top to Top". You can change this setting with the
copy User Tools.
102
P.314 "General Features".