The next group is Snapping. It includes a single button with a drop-down menu that controls snapping and snapping options. Snapping allows you to easily draw features so that they maintain connections to other features on the same or a different layer while editing. From the Snapping group, you can set where you want to snap to new features or sketches to existing features.
A sketch is something you create while editing. It can represent a new feature, such as a new street centerline or parcel polygon. Sketches can also be shapes you draw to modify or reshape existing features, such as a line drawn to split a polygon. Sketches are temporary and only exist in the memory of your computer.
If the sketch represents an update or change to one of your layers, it is not committed back to your GIS data until you save your edits. Once you save your sketch, it becomes a true feature. This is why you should save often.
With Snapping...