The mini-poster is a printable poster that acts as an advert for and a gateway into your interactive ePoster. Onsite conferences usually print and display these at the venue as a way of promoting the ePosters.
You add the information that will be used to make your mini-poster in the Stack Poster Details tab within the stack/ePoster editor.
You can then enter all the information that will appear on your mini-poster, as described below. Remember to save your ePoster after you have added these details.