Mobile Android- Cannot capture in object spy

I am using the object spy in an Androin device to capture objects.
Objects gets displayed under ’ All Objects’, but when I highlight an object, it does not display under Captured object. It does not seem to be enabled.

Thanks for looking.

I believe that when you highlight the object it will show you where it is on the image to the right but to save the object you need to select the checkbox next to the object.