Use this procedure to add lines to a grid with evenly spaced lines. The lines will always be distributed evenly along the grid axis. If you need non-regular lines with different spacing between them, open the grid’s Properties palette, and change the Layout type to Manual.
- Select the column grid to which you want to add lines.
- Add grid lines:
If you want to… Then… add grid lines to the X axis of the grid click 
. 
Click the grid X axis. The number of grid lines increases by one while the overall size of the grid remains the same. add grid lines to the Y axis of the grid click . 
Click the grid Y axis. The number of grid lines increases by one while the overall size of the grid remains the same. Alternatively, you can add grid lines by increasing the value of Number of Bays for X axis and Y axis on the Properties palette.