Custom code to keep rtMedia uploader open by default

functions.php

// Put below code at end of your theme's functions.php file.

add_action( 'wp_head', function() {
    ?>
    <style>
        #rtm-media-gallery-uploader {
            display: block !important;
        }
    </style>
    <script>
        if( typeof rtMediaHook == "object" ){   // check if rtMediaHook defined or not
            rtMediaHook.register(
                'rtmedia_js_uploader_slide_after_gallery_reload', // hook id here
                function () { // your function here
                    return false;
                }
            );
        }
    </script>
    <?php
} );