text: **5.3 Delete subnodes**
  
  To delete subnodes, double click on the specific subnode or line (figure 30a), a pop-up window warning message 
  opens. (See figure 31). 
  
  Press the “Ok” button to delete the sub node or the “Cancel” button not to delete. (see figure 31 a) 
  
  ***Figure 30. Key Categories screen – delete subnodes***