You can lock properties or channels to prevent any changes from happening on the selected property or channel. You cannot change values nor add keyframes on a locked property or a channel. Locked properties and channels are retained when the .fbx file is exported and imported to the Maya software and re-imported to MotionBuilder.
To lock a channel or property in the Resources window:
Expand a property if required to access its channels.
The context menu displays the options available for the selected property.
The Locked channels or properties display with a red background.
To unlock a property: