When you load a source image (OTHER then the Output image), the Display Side by Side button turns ON, but there is no Synchronize scrolling button (Everywhere else it shows up when the Display the Side by Side button is ON).
To display it, you need to toggle the Display Side by Side button with one of the other two display buttons. The Synchronize scrolling button then shows up and is OFF.
Now there come two situations:
1. If the loaded source image is different from the input image, both groups of the Zoom buttons are enabled, which does correspond to the Synchronize scrolling button = OFF (OK)
2. If the loaded source image = input image, the left group of the Zoom buttons is disabled (synchrony = yes), which does NOT correspond to the Synchronize scrolling button = OFF.
Also, there is no synchrony between the two halves of the image are, even if you additionaly turn the Synchronize scrolling button ON.
One minor Clone irregularity still remaining
Moderator: jsachs