S T R U C T O R I Z E R - User Guide
Elements

Here you can find explanations for the different kinds of elements that can be inserted into a Nassi-Shneiderman diagram and how to do this in Structorizer.

The framing Program (or Subroutine or Includable) element will already be there.

To perform some (more or less atomic) action you will use the basic element type: Instruction.
If you want to delegate complex operations to another diagram, insert a Call.

If the further activities depend on a condition or selection, insert an IF or CASE statement.

If you have to repeat some bunch of operations, you'll need one of the loop elements: FOR, WHILE, REPEAT or Endless loop.

If you happen to have to do several sub-tasks, which are mutually independent and could be performed in arbitrary order or in parallel, then you may choose to make them branches of a Parallel element.

Just inspect the respective subsection for details.