Omron F250-UME Software Manual page 389

EC Positioning
Left Key:
SHIFT+Left Keys:
Up and Down Keys: Switches between setting items.
3. Select the mask size.
4. Select OK.
The settings will be registered and the screen in (1.) will return.
Decreases the lowest digit by one.
Decreases the value 10 times faster.
Section 2-16
2-16-(6)