Selecting a ratio using the scroll keys

Select a ratio using [] or [].

Press [R/E].
Press [Reduce] or [Enlarge], and then select a preset ratio which is close to the desired ratio using [] or [].
Press [Zoom].
Specify a ratio using [] or [], and then press the [OK] key.
Place the original, and then press the [Start] key.
Pressing [] or [] changes the ratio in increments of 1%. Pressing and holding down the relevant key changes the ratio in increments of 10%.