The next window lets you specify options for merging the photos.
If your photos were taken hand-held, check the Align source images box and select hand-held.
If your scene includes moving objects or people, check the Show options to remove ghosts box.
If the bracketed photos you loaded are RAW files, check the Reduce noise box. You may also select this option with JPEG or TIFF files.
Click on Align & Merge to proceed to the next step.