This Page was created to show that by using the Post ID number it’s possible to display on a single Page photos that appear in various Posts on my site.
The original Gallery has three small thumbnails across. I’ve changed the display settings of the Gallery here to [ gallery id="XX" columns="2" size="medium" ].
Settings for this Gallery are [ gallery id="XX" columns="4" ] no need to mention thumbnail size, the default is being used. (If your theme has a particularly narrow central column, look at using the full width page template if available.)
And because you are inserting multiple Galleries on a single Page, you can also use Pagination!