There
            are several precision keyframe editing controls available to you
            in the form of hotkeys. The following section lists the hotkeys,
            their function, and how the keyframe appears in the editor—see 
                     Animation Editor.
         
            
               
                  
                  
                  
                     | Hotkey and Function | Keyframe in Animation Editor | 
                  
                     | Shift + T Locks keyframe time |  | 
                  
                     | Shift + V Locks keyframe value |  | 
                  
                     | Shift + L Locks tangent length |  | 
                  
                     | Shift + O Locks tangent orientation |  | 
                  
                     | Ctrl + Shift + L (Windows and
                        Linux) or Cmd + Shift + L (Mac OS) Unifies tangent length |  | 
                  
                     | Ctrl + Shift + O (Windows and
                        Linux) or Cmd + Shift + O) (Mac OS) Unifies tangent orientation |  | 
               
            
          
         NoteTo return the keyframe
               to its previous state, press the hotkey again.
            
         Other hotkeys are available
            for keyframing—see 
                     Hotkeys.