An additional aspect of formatting a field is specially formatting NULL values. When formatting a field, select the Pane tab and locate the Special Values section, as shown in the following screenshot:
Enter any text you would like to display in the pane (in the Text field) when the value of the field is null. You can also choose where marks should be displayed. The Marks drop-down menu gives multiple options that define where and how the marks for null values should be drawn when an axis is being used. You have the following options:
- Show at Indicator results in a small indicator with the number of null values in the lower ...
