Specify the type of Fold as Postcard, Click on "Next" and set shape of Label as Rectangle.
Select General Settings in the Text Properties and set the Position X and Y, Data Source, Text etc. of the text.
Now, edit Font Settings in the Text Properties by changing the Font, Style, Size etc.
For the Preview Edit the Vertical Margin, Horizontal Margin and Print Option such as Copies Number, Maximum Cards Per Page etc.