anyone knows what's this? couldn't find any documentation...
Excellent question .. I believe the answer is how you define the data-types for the grid ... A data type of "0" indicates that the maximum characters is set equal to the size of the column, and "-1" indicates no limit other than those imposed by the internals of the grid (i.e., 32766 characters). When a cell may contain more text than it can display, the cell scrolls horizontally in a fashion similar to entry fields.