In Turing programming, there is allowed to use compound machines as
instructions in the graph-program- something like procedures. Visual Turing
supports these constructions. You can insert a procedure by selecting the
Tools/Insert Machine menu option or a button from the main toolbar - see
the figure below.
The cursor is over the button which inserts a new machine.
See the properties dialog for the machine
The machines can be selected from a special panel - a tree view- which
shows the procedures and the variables assigned connected to it -see the
figure below.