When you are working in a project, you can use shortcut key combinations or the right-click shortcut menu to temporarily override snap settings. Temporary overrides affect a single pick only.
For example, if you need a one-time snap to the center of an arc, you type SC or select Snap OverridesCenters from the context menu, so that only arc centers are recognized as a snap option. After you make a pick, snapping returns to the settings specified in the Snaps dialog.
To temporarily override snap settings:
See Object Snaps and Snap Shortcut Key Combinations for object snap descriptions and snap shortcut key combinations.