View > Grid
The Grid and Snap-to-Grid tools allow for more precision in positioning elements and selections on the image. The Grid is a network of horizontal and vertical lines that covers your workspace. You may use the lines of the drawing Grid as a guide. Use the 'Grid Properties' command to set the grid properties.
1. Do one of the following:
 Choose View > Grid
Click the Grid button
Related Information
Tools > Shapes > Grid Lines
View > Snap to Grid
View > Grid Properties
Search the Internet