This option controls the behavior of grid column resizing, both in the Visual Designer and at run time when the "resizable columns" grid feature is enabled.
Possible values are:
- "simple" - the grid maintains its total width; space needed to resize a column is borrowed from the next column
- "excel" - columns that follow the column being resized are moved, similar to how Excel column resizing works (this option is the default)
Where do you save this configuration option? Here