PTC FlexPLM Fundamentals > Measurements > Working with the Measurement Editor > Working with the Measurement Table Editor > Entering Null Values in the Measurement Table
  
Entering Null Values in the Measurement Table
Null Values
The system supports the entry of null values in measurement templates and sets. Null values are those POM values in templates or sizes that are blank; they are not zero. To enter a null value, click the size column for the POM whose measurement or grade rule value you want to change. Press DELETE to clear the value, and then press TAB to exit the cell.
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Pressing ENTER discards your changes and refreshes the page.
When inserting null measurement values, the system warns you that changing the size value for the POM also changes the grade rule. The system prompts you to confirm your actions. Click OK to change the grade rule for that size only.
When inserting null grade rule values, the system clears the Grade Rule Increment value. The grade rule is no longer uniform, and the increment is no longer applicable.