To create custom guides or irregular guides, use guide layers.
• To display or hide the drawing guides, select View > Guides > Show Guides.
Note: If the grid is visible and Snap to Grid is turned on when you create guides, guides snap to the grid.
• To turn snapping to guides on or off, select View > Snapping > Snap to Guides.
Note: Snapping to guides takes precedence over snapping to the grid in places where guides fall between grid lines.