Who wants anything at its Original Size? Your ears, your nose, your feet... any other parts............ Original Size?
Can't think of any need for Original Size..  but there it is in your Qimage Ultimate.
When would I need it or use it?
1) Scanned images that you want to print at the scanned size.
2) Images that you have created to an exact specified size at a specified  ppi.
3)Targets  
Please watch the video and enjoy seeing Original Size
Remember to use Full screen and get HD
https://youtu.be/JLzo3YD1UiMThank you 
Fred