Levenhuk C800 NG Digital Camera, USB 2.0 - Manual (Page 32)

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6.14 Exit
Choosing File>Exit command will close all of the active images and remove their
windows from the screen. After all of the images are closed, ToupView will end itself.
Note
:
If an image has been modified before attempting to Exit it, ToupView will issue
a warning to ask if user want to save the image or not first.