Alt+right-click a viewport. > Animation quad menu
The Alt+right-click quad menu has commands to assist in animation.
Lets you change the active reference coordinate system.
Keyframe—Sets a key at the current frame. Set Key or Auto Key do not need to be on.
Show Trajectories Toggle—Toggles the display of trajectories.
Delete Selected Animation—Deletes any existing animation keys for all selected objects, as well as any sub-object animation. Each object remains in its state at the frame in which you use this command.
Commands in this quadrant are meant primarily as aids to character animation. Use the Freeze commands to set the character's initial pose. Then you can later use the “to Zero” options to return to that initial pose.
Freeze Transform—Sets the object's transform values to zero without actually moving the object.
Freeze Rotation—Sets the object's rotation value to zero without actually moving the object.
Transform to Zero—Transforms the object back to the zero pose established by Freeze Transform.
Transform To Zero works only if you have previously invoked Freeze Transform or Freeze Rotation.
Note: There is also a Position To Zero command, which returns the object to the zero position only (no rotation). You can use Position To Zero by creating a keyboard shortcut for it. See Additional Keyboard Commands.
Rotation to Zero—Transforms the object back to the zero rotation established by Freeze Rotation.
Rotation To Zero works only if you have previously invoked Freeze Transform or Freeze Rotation.