The Font tab of the Sheet Settings dialog provides the font settings that apply to null values and locked or selected cells.

This tab provides the following items:
| 
                 Sheet Settings  | 
            
                 Description and Reference  | 
        
|---|---|
| 
                 NullFont  | 
            
                 Sets the font for null values.  | 
        
| 
                 LockFont  | 
            
                 Sets the font for locked cells.  | 
        
| 
                 SelectionFont  | 
            
                 Sets the font for selected cells.  |