Advanced
FillWidth — Equal Distribution
Set FillWidth=true to distribute remaining horizontal space equally among columns that have no explicit Width. Fixed-width columns keep their set size.
FillWidth — Proportional Flex
Use the Flex parameter on individual columns to control how much of the remaining space each column takes. Flex=2 means twice as wide as Flex=1.
AutoSizeColumns — Content-Aware Sizing
AutoSizeColumns sizes every column to its rendered header and cell content after each data load. If the combined width is less than the grid container, the columns scale up to fill it.