AdapTable provides a range of useful System Filters (e.g. 'Blanks', 'Zero', 'Yesterday') to complement any Custom Filters provided by users at design-time.
System Filters appear in both the Quick Filter Bar and the Filter Form
By default all System Filters will be shown. However the `SystemFilters` property of Filter State allows you to choose which (if any) you want available.
In this example we have stipulated that just a small selection of System Filters are available: 'Positive', 'Zero', 'Contains', 'Equals', 'Is', 'On'.
And we then use the 'Positive' System Filter as the Column Filter for the 'Order Chg.' column.