In Turing programming, the essential element is the instruction. See
Instructions in Visual Turing for more information.
You can insert a new instruction using the Tools/Insert instruction
menu option or the button from the main toolbar - see the figure below.
Inserting a new instruction from the toolbar
When you press the left button of the mouse, the instruction appear
and you can drag it anywhere you want. When you release the button, the
instruction will be effectively inserted in the graph.