Top and Bottom png images like on most pages. Example: Main Page

HTML example:

<!-- START: Page Background -->
<img class="nk-page-background-top" src="assets/images/bg-top.png" alt="">
<img class="nk-page-background-bottom" src="assets/images/bg-bottom.png" alt="">
<!-- END: Page Background -->

Fixed background image. Example: 404.html

HTML example:

<!-- START: Page Background -->
<div class="nk-page-background-fixed" style="background-image: url('assets/images/bg-fixed-2.jpg');"></div>
<!-- END: Page Background -->