Customize menu > Preferences > Preference Settings dialog > Animation tab
On the Animation panel of the Preference Settings dialog, you set options relating to animation. Options include displaying animated objects in wireframe viewports, the assignment of sound plug-ins, and controller defaults.
Procedures
To change the default transform center:
Choose Customize menu > Preferences > Preference Settings dialog > Animation tab.
Turn off Local Center During Animate in the Animate group.
This changes the default and activates all the transform center buttons. You can now move about the selection, coordinate center, or local pivot.
To set the key bracket display:
Choose Customize menu > Preferences > Preference Settings dialog > Animation tab.
Use the controls in the Key Bracket Display group to specify how you want key brackets displayed in wireframe viewports.
To specify default controller settings:
Choose Customize menu > Preferences > Preferences Settings dialog > Animation tab.
Click Set Defaults in the Controller Defaults group.
The Set Controller Defaults dialog appears.
Choose a controller type from the list of available controllers and click the Set button.
A dialog containing the default settings supported by the selected controller type appears in, for example, the In and Out tangents for a Bezier controller.
Make changes to the controller settings.
Once you click OK in the Set Controller Defaults dialog, the controller defaults are changed.
Changes to the controller default settings are written to your gmax.ini file and become the defaults for all newly assigned controllers and all new scenes.
If you decide that you want to revert to the original gmax defaults for all controllers, you can click Restore To Factory Settings.
Interface
Key Bracket Display group
When you move to a frame, the software displays white brackets around objects that have transform keys at that frame, including cameras and lights. These key brackets only appear in wireframe viewport displays.
All Objects/Selected Objects/None: Specifies which objects will display key brackets.
Use Current Transform: Displays brackets only on those frames containing a key for the transform button (Move, Rotate, or Scale) currently active in the toolbar.
If no transform button is active, a bracket appears when you're on a frame containing any of the three transforms.
Position/Rotation/Scale: Specifies which type of transform displays a bracket. If only Rotation is turned on, brackets appear only on those frames containing Rotation keys. These check boxes become active when Use Current Transform is turned off.
Animate group
Local Center During Animate: Locks the center method to local. Turn off if you want to animate around a non-local center such as world or selection.
Sound Plug-In group
Assign: Displays a dialog listing all sound plug-ins installed in the system. Select a new plug-in to replace the current one.
Controller Defaults group
Sets the default values for animation controllers capable of supporting default settings. For example, set the default values for tension, continuity and bias in the TCB float controller.
Set Defaults: Displays a dialog listing all controllers that can have their default values changed. The Set button becomes available when you choose a controller class from the list. Choose this button to display a dialog, provided by the plug-in controller, in which you set default values.
Restore To Factory Settings: Prompts you to verify if you want to reset all controllers to their default settings. If you choose Yes, the defaults are reset for all controllers currently in the system.