입맛에 맞게 css나 마크업 수정하시면 될 것 같습니다.

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[code]

<style>

/* Floating style start */
.FloatingWrap{position: fixed;bottom: 0;left: 0;width: 100%;background: #f00;z-index: 100;}
.FloatingBox{}
.FloatingOpen{text-align: right;position: relative;padding: 5px 50px;}
.FloatingOpen span{cursor:pointer;width: 100px;height: 70px;text-align: center;display: inline-flex;justify-content: center;align-items: center;background: #000;color:#fff}
.FloatingOpen #FloatingOpenBtn{color:#fff;}
.FloaingDB{display: none;background: #ddd;height: 250px;}
/* Floating style end */

</style>

<div class="FloatingWrap">
    <div class="FloatingBox">
        <div class="FloatingOpen">
            <span>
                <div id="FloatingText">열기</div>
                <img id="FloatingOpenBtn" src="<?php echo G5_THEME_IMG_URL ?>/FloatingArrowDown.png"">
            </span>
        </div>
        <div class="FloaingDB">
            asd
        </div>        
    </div>
</div>

<script>
$(function () {
    $(".FloatingOpen span").on("click", function() {
        $(".FloaingDB").slideToggle("fast", function() {
            var image = $("#FloatingOpenBtn");
            var text = $("#FloatingText");
            if (image.attr("src").includes("FloatingArrowDown.png")) {
                image.attr("src", "<?php echo G5_THEME_IMG_URL ?>/FloatingArrowUp.png");
                text.text("닫기");
            } else {
                image.attr("src", "<?php echo G5_THEME_IMG_URL ?>/FloatingArrowDown.png");
                text.text("열기");
            }
            image.fadeIn(2050);
        });
    });
});
</script>

[/code]