After analysis of all the images, the autoselect slider becomes active. The minimum and maximum quality levels are displayed above it.
With the slider, you can select the quality threshold under which an
image is not included in subsequent processing.
In the list frame, the images selected for processing have a checkmark in
the leftmost column checkbox
Alternatively, whether you used the analyze tool or not, you can manually toggle an image selection for further processing by clicking on the checkbox
All is now set for stacking the selected images