Create Nassi-Shneiderman Processes
Nest Processes and Decisions
If there are no further decisions under an outcome, you can join the cells and type in the process that follows.
Join cells to create a process
Specify the process
To nest a decision under an outcome, drag another decision symbol from the library and modify it to fit into the table cell. Then select the rows under the decision symbol and choose Split Cells under the Table menu.
Split cells to create the two possible outcome columns
The two new outcome columns
Keep joining and splitting cells until your table is fully formatted. If you have an uneven decision, you can move the gridlines into place to match the decision divisions. To do so, click on the gridline to select it (this should make the gridline turn a light green color) and drag it with the mouse.