To add an element to the diagram, you proceed like this:

1. Select an existing element or an empty block by clicking on it (or by traversing the selection via cursor keys to it).
2. Then you will have four possibilities:

• Do a right click on the selected element and use the contextual menu "Add › Before" or "Add › After" to add a new element before or after the selected one.
• Use the menu "Diagram › Add › Before" or "Diagram › Add › After" to add a new element before or after the selected one.
• Use one of the speed buttons in the tool bar: .
  If you hold the <Shift> key pressed when clicking on the chosen button then the element will be inserted before the selected item, otherwise after it.
• Use the respective function key shown in the according menu item of "Diagram › Add › Before" or "Diagram › Add › After" (e.g. <F6> to append an IF statement to the selected element, <Shift><F6> to insert an IF statement before the selected element etc.).
  

Note: double-clicking an empty block in the diagram always inserts a new element of the type "Instruction".