To add a question to a decision node, open the context menu and select the Edit Node option.
Click on the
icon.
Enter a question that has either Yes or No as its answer.

Once you have entered your questions close the dialog.
Note that decision nodes only take their "Yes"
exit route if the answer to all
conditions specified is "Yes", otherwise the "No"
exit is taken. If multiple questions have been added to a decision node
only one dialog containing all questions will be displayed at run-time.
The Yes button should be used only if true for all
questions.
Values of existing variables
can be displayed within prompt strings. These variables must be enclosed
in {}, for example "Do you want to continue? Flute Length is {User.FilterLength}".
The attribute name in the brackets is then replaced by its value in the
prompt string at run-time.