You can access a number of snap features from the Options tab of the Grid And Snap Settings dialog. Right-click any of the snap buttons on the main toolbar to display the Grid And Snap Settings dialog or choose Tools menu (or Scene menu if using the Alt menu system) 
Grids And Snaps Grid And Snap Settings, then click the Options tab.
Display and General Settings
- Marker settings
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Determine the size of the snap cursor. To prevent the snap cursor from appearing, turn off Display.
- Snap Radius settings
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Determines how close the cursor needs to approach a snap point before the snap preview or actual snap takes place. These are global settings, affecting all snap interactions, and are measured in terms of the pixels in a "search region" around the active point of the cursor.
- Snap to Frozen Objects
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Normally, if an object is frozen you can't snap to it; this option lets you snap to frozen objects.
Settings for Angle and Percent Snap
The following Options settings are for two snap buttons that operate independently of standard snaps.
- Angle (deg)
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A global setting, in degrees, that determines the angle of rotation for a number of features in 3ds Max, including the standard Rotate transform. As you rotate an object (or group of objects), the object moves around a given axis in the increment you set. Angle snap also affects the following:
- Pan/Orbit camera controls
- FOV and Roll camera settings
- Hotspot and Falloff light angles
For more information, see Angle Snap.
- Percent
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Sets a percentage increment during a scaling operation.
For more information, see Percent Snap.
Rotating and Scaling with Snaps
The effect of rotating and scaling with snaps depends on whether Auto Key is on or off:
- With Auto Key on, snap toggles are disabled, while Angle and Percent snaps remain active. Rotation and scaling occur around the pivot point of the object.
- With Auto Key off, rotations and scales occur around the snap point. For example, using Vertex snap, you can rotate a box about any of its corners.
Translation Options
By default, the Use Axis Constraints option is off.
As of 3ds Max 2011, buttons on the Axis Constraints toolbar update interactively, depending on which portion of the gizmo or geometry you use to move the object.
The Translation group also lets you toggle display of a rubber band line between the start and end points during a snap operation.
Settings for Spinner Snap
You set the spinner snap on the General panel of the Preferences dialog. Right-click the Spinner Snap button on the main toolbar to display this panel.
Spinner snap-
Sets a numerical increment for spinner fields. If you’re using generic units of 1 inch, a setting of 12 would let you resize objects by one foot with every click, or add 12 segments to a sphere.
The same setting applies to all spinner fields. Since spinner snap is a toggle, you can easily turn it on when needed and use the default at other times. Spinner snap has no effect on dragging a spinner, only on single clicks.
For more information, see Spinner Snap.