Gray Scale Edge Checkers OCR Type A23011 ā 411.1 Gray Scale Edge Checkers11.1.2 Checker SettingSet the gray checking area and set parameters, etc.521. ShapeSelect the shape for the checker area.22. DirectionSelect the scanning direction for the checker being created.This parameter is not displayed when line scanning is selected.23. Scan MethodSelect the scan method for the checker being created.This parameter is not displayed when line scanning is selected.