Use the following hotkeys
            when working in the Regrain menu.
         
            
               
                  
                  
                  
                  
                     |  | Press: | To: | 
                  
                     |  | F1 | Switch to Front clip view | 
                  
                     |  | F2 | Switch to Back clip view | 
                  
                     |  | F3 | Switch to Matte clip view | 
                  
                     |  | F4 | Switch to Result clip view | 
                  
                     |  | F5 | Switch to Player (after process) | 
                  
                     |  | 0 | Load | 
                  
                     |  | \ | Process clip | 
                  
                     |  | Shift+0 | Save | 
                  
                     |  | Q-click | Change RGB Radius X and Y values proportionally | 
                  
                     |  | P-click | Change single channel's values proportionally | 
                  
                     |  | Ctrl-drag | Sample image area (rectangular selection) | 
                  
                     |  | (Linux) Backspace (Mac) Delete | Undo | 
                  
                     |  | D | Reset all | 
                  
                     |  | (Linux)D+Enter (Mac) D+Return | Reset all (no confirm) |