How to Use Spy Glass for Rigid Fusions
Select Spy Glass from the toolbar.
Spy Glass superimposes the second image set in a frame over the first image set.
Position the window ① anywhere over the underlying image.
Resize or reposition to the desired area and adjust its shape by dragging the corners of the window.
Scroll through the image slices using the arrow buttons ③.
Scroll using the mouse wheel or by dragging up and down in the view if Scroll is active.
Zoom to your region of interest.
You can also use Ctrl and the mouse wheel to zoom in or out.
Review and accept the fusion result if it is satisfactory ②.
Select Done when complete.
The fusion result is saved for further processing.