Snapping allow user to perfectly align graphics objects on canvas. To enable or disable snapping, press on your keyboard or toggle the button of the Snapping control.
The following snapping options are available:
Pixels - snap to pixels
Grid - snap to grid
Guides - snap to guides
Object points - snap to object's node points
Object bounds - snap to object's bounding box
Document - snap to document boundaries
As an optimization, you can use the If in viewport option from the dropdown menu to consider only the objects in the viewport when doing Object points and Object bounds snapping.