Voltage Level Thresholds

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Hello,

Before I changed the setting of Voltage Level Thresholds (Diagram Menu, Annotation, Diagram Range Checking) So that each voltage level appears with different pre-set color. Now I need to re-adjust each voltage level with a different color however I can't find the option: "Use voltage level thresolds" under the Tab "Diagram Range Checking"

Thanks in advance for your kind support