gridalign
align the grid in the container to the left, right or center
Alignment with gridwidth:
Left aligned
[featured_image_pro gridwidth='50%' posts_per_page='4' gridalign='left']
Center aligned
[featured_image_pro gridwidth='50%' posts_per_page='4' gridalign='center']
Right aligned
[featured_image_pro gridwidth='50%' posts_per_page='4' gridalign='right']
Alignment without gridwidth
Center aligned
[featured_image_pro posts_per_page='4' gridalign='center']
Left aligned
[featured_image_pro posts_per_page='4' gridalign='left']
Right aligned
[featured_image_pro posts_per_page='4' gridalign='right']