Status bar > Grid and Snap panel > Angle Snap
Angle snap determines the incremental rotation for a number of features in gmax, 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 Pan/Orbit camera controls, FOV and Roll camera settings, and Hotspot/Falloff spotlight angles.
Procedures
To turn angle snap on:
Click Angle Snap on the prompt line.
When turned on, angle snap affects all rotational transforms.
When you move an object with snap set, a pair of buttons in the status line determine the kind of snapped move you can make.
To rotate an object an even number of degrees:
Turn Angle Snap and rotate the object. The rotations take place in five-degree increments as a default.
To rotate an object a precise degree of rotation, do one of the following:
Click Select and Rotate, then right-click it to display the Type In Transform dialog. Enter the exact rotation you want.
Right-click Angle Snap and select the Options panel. Set the Angle snap in the General area to the precise degree of rotation you need, then rotate the object. It snaps to the angle youÆve entered.
Interface
The angle increment is set on the Options page of the Grid and Snap Settings dialog. Right-click the Angle Snap button to display the Options page of the Grid and Snaps Settings dialog. The default is 5 degrees.