Best approach when modifying the Media Manager
This is my go to snippet for things like this. <?php add_action(‘print_media_templates’, function(){ // define your backbone template; // the “tmpl-” prefix is required, // and your input field should have a data-setting attribute // matching the shortcode name ?> <script type=”text/html” id=”tmpl-my-custom-gallery-setting”> <label class=”setting”> <span><?php _e(‘My setting’); ?></span> <select data-setting=”my_custom_attr”> <option value=”foo”> Foo </option> … Read more