At runtime, the user can take a picture of the scene using the Photo Tool (Menu -> Tools -> Photo).
AT+Explore saves the picture to ​“persistentDataPath” folder​ but, if you want, you can easily integrate an awesome free plugin called ​Unity Native Gallery.​

After downloading Unity Native Gallery you can put ​this script​ in the scene. Be sure to follow the Android Setup and iOS Setup instructions in the Native Gallery documentation.