Manual Reference Animation Animation Menu
Keyframe
Only parameter changes to selected (active) objects will be recorded
An entry will exist for each selection object in the scene. If you only want to record the settings for a specific selection object, make your selection here.
If this option is activated, only objects contained in the selection object can be selected. This is practical when working in Autokeying mode since it prevents you from inadvertently moving objects that should not be animated.