The 3D view boxes allow you to browse through the converted font, showing three uppercase letters, three lowercase letters, and three numbers or symbols. The character order is the same as the selected character set.
You can change the 3D background with mySewnet™ Configure.
View the previous nine characters.
View the next nine characters.
This box shows how big the 3D view you can see is as a percentage of the real size of the generated stitch files. This depends on the Real Size setting being correct in mySewnet™ Configure.