[gallery]
You can use this page to test the Theme's handling of the gallery shortcode, including the columns
parameter, from 1 to 9 columns. Themes are only required to support the default setting (3 columns), so this page is entirely optional.
[gallery columns="1"]
[gallery columns="2"]
[gallery columns="3"]
[gallery columns="4"]
[gallery columns="5"]
[gallery columns="6"]
[gallery columns="7"]
[gallery columns="8"]
[gallery columns="9"]