I am trying to figure out this plugin.  We are going to probably purchase the PRO version, but what I am trying to figure out is how I can have my Invitation, RSVP Card and Save the Date ALL in one.  They are 3 different sizes, but need to be in the same product.  I watched the tutorial on how to create "sides" but that does not seem to work.  


Can someone offer any advice / how to?  Thank you!