The gridLines property is used to control the line visibility that separates the rows and columns. The Grid allow us to display the following grid lines, Default - Shows the Horizontal line. None - Shows no line. Both - Shows both Horizontal and Vertical lines. Horizontal - Shows the Horizontal line. Vertical - Shows the Vertical line. In this demo, you can modify the display of gridlines by selecting values in the toolbar. More information on the gridLines configuration can be found in this documentation section.