You may create the text simply having added Text object.
Choose the pointer tool from the Drawing toolbar. Drag
in the drawing window until the Text block is the size you want. You can
draw a square block by holding down SHIFT as you drag. Double-click the
Text object, and then type Sample Flowchart text. When you finish typing,
click outside the Text object. To format text use the Text... command
on the Format menu or the tools on the Format text toolbar to apply formatting
to the selected Text object. DiagramStudio Connectors are designed so
that you can add text to them the so-called Labels. You can add or edit
the Labels of Connectors by double-clicking the Connector, and then editing
the text block of Label. Double-click on the connector under decision
symbol and type in No.
Your chart should look like the one shown below.