You
            can do most trimming operations with hotkeys (including trimming
            video, transitions, and audio). Hotkey trimming applies to the current
            element. When trimming with hotkeys:
         
         
            - The Lock, Ripple, and Link settings have
               the same effect as in gestural trimming.
            
- In Head/Tail view, the transition that
               is closest to the centre of the Record Area is the one that is trimmed.
            
- You can trim by a preset number of frames
               or assign a frame number to the trim. 
            
To trim a clip with hotkeys in Timeline,
            Trim, or Head/Tail view:
         
         
            - Select the timeline element in Timeline
               or Trim view, or put the cursor in the appropriate trimming hot
               spot in Head/Tail view.
            
- To assign a value to the trim, enter
               a value in the numeric keypad.
            
- Do one of the following.
                  
                     
                        
                        
                        
                        
                           | To: | Press and hold: | Then press: |  
                           | Trim the tail | B | left or right arrow key
                              to add or subtract frames from the clip being trimmed. |  
                           | Trim the head | N | left or right arrow key
                              to add or subtract frames from the clip being trimmed. |  
                           | Slide a transition | M | left or right arrow key depending
                              on the direction you want to slide the transition. |  
                           | Slip a clip | , | left or right arrow key depending
                              on the direction you want to slip the clip. |  
 
 TipYou can hold the
                     arrow key to trim continuously.
                   
- Your clip is trimmed according to the
               value defined in the numeric keypad. For example, to trim the tail
               by 5 frames, enter 5 in the numeric key pad, hold the B key, and then press the right arrow key. Every time you
               press the right arrow key,
               the tail is trimmed by 5 frames.
            
To trim a clip with hotkeys in Timeline
            or Trim view:
         
         
            - Select the timeline segment in Timeline
               or Trim view.
            
- Move the cursor until the Trim Head,
               Trim Tail, or Slide cursor appears, and then Ctrl+Alt-click the segment.
            
- Enter a value in the numeric keypad.
            
- Press the left or right arrow key depending
               on the direction of the trim.
               The clip is trimmed according
                  to the value entered in the numeric keypad. For example, to trim
                  the tail by 5 frames, Ctrl+Alt-click
                  the tail of the segment, enter 5 in the numeric key pad, and then
                  press the right arrow key.
                  Every time you press the right arrow key,
                  the tail is trimmed by 5 frames.