How to Use ROI Definition Dialog
Scroll through the images using the sliders ① to find ROIs.
This can also be done by using the mouse wheel or scroll function.
Highlight an ROI in one view by drawing an outline ②.
The area is marked in blue and creates a ray ③ in the other view.
Highlight the ROI in the other view.
If the rays in both views fail to intersect, OK is disabled.
Verify the ROI by scrolling through the images.