When viewing installed themes or searching for new themes in your WordPress dashboard, See More Themes allows you to… see more themes… on the screen at once.
There are no plugin settings. Simple install and activate the plugin and you’ll see the changes on your Themes page in your WordPress dashboard.
Plugin not installed:
This plugin, like WordPress, is licensed under the GPL. GNU General Public License v2 or later: http://www.gnu.org/licenses/gpl-2.0.html
Feel free to fork the repo on Github and submit pull requests if you’d like to make contributions to the plugin.