0   | The cell is not protected at all. The user can access the cell and modify its value. This is the default setting.  | 
1   | The cell is read-only. The user can move into the cell, but cannot change its content.  | 
2   | The cell is protected. Any access to the cell is denied. If the user tries to move into a protected cell with the keyboard, it is skipped and the cursor goes to the next valid cell. If protected cell is clicked, no action occurs.  | 
procedure division. ...   modify screen-1-gr-1 x = 1, y = 2 cell-protection 1 ...  |