Snapping is managed at the map level, so whenever a snap type is turned on, you can snap to any visible feature layer. Snapping is also part of ArcGIS Engine, so you can build custom applications that utilize snapping. The Snapping toolbar environment is used by the editing tools, but is also available outside of an edit session and is used by other parts of ArcGIS, such as georeferencing and the Measure tool. There is minimal setup required, since the most common snapping types are enabled by default. The Snapping toolbar is the central location where you manage the snapping settings.

Snapping toolbar (the default snapping environment) This post provides an overview of each environment, so you can decide which one allows you to get your editing done most effectively. Alternatively, you can enable classic snapping, which provides fine-grained control over the snapping environment. The default is the new Snapping toolbar, which is flexible, easy-to-use, and has more snapping types, more options, and better feedback. In ArcGIS 10, you can choose from one of two snapping environments to use when you are editing. Snapping allows you to create features that connect to each other so your edits are more accurate, with fewer errors.

How to snap map