Ricoh Aficio 551 Copy Reference Manual page 118

Copying
B
Press the [Size Mag.] key.
2
C
Press the [D. Mag.(%)] key.
To specify a ratio with the [n] and [o] keys
A Press the [no Keys] key.
B Press the [Horizontal] key.
C Adjust the ratio using the [n] or [o] key.
Note
Pressing the [n] or [o] key changes the ratio in 1% steps. Pressing and
holding down the [n] or [o] key changes it in 10% steps.
If you have incorrectly entered the ratio, readjust the ratio with the [n]
or [o] key.
D Press the [Vertical] key.
E Adjust the ratio with the [n] or [o] key.
F Press the [OK] key.
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