0-based column index of this index in the current view layout. Default value is 0
RowIndex and ColumnIndex are updated by ImageViewerViewLayout during UpdateTransform. These values are set to the 0-based index of the item row and column in the view grid if any). The values will be used by code that requires finding the item to the left, top, right or bottom of another item such as ImageViewerSelectItemsInteractiveMode when using the arrow keys.
Medical Web Viewer .NET