To Turn On Grid Snap and Set the Snap Spacing

1. On the Status Bar, right-click on snap mode Find and select Snap Settings.
2. In the Drafting Settings dialog box, Snap and Grid tab, click Snap On.
3. Under Snap Type, make sure Grid Snap and Rectangular Snap are selected.
4. In the Snap X Spacing box, enter the horizontal snap spacing value in units.
   Note: The check box, Equal X and Y Spacing, applies to both snap and grid spacing.
5. Modify other settings as needed.

Note: Snap mode can be turned on and off with the F9 key. You can suppress snap temporarily by holding down F9 while you create or modify an object.