Source: dist/css/acc_uc.css, line 10773
8.1.4 Background Size
For many images you will need top place background images in to a cardnial location.
Example s
.bg_unset
removes any css background size
bg_unset
.bg_auto
auto
bg_auto
.bg_cover
cover
bg_cover
.bg_contain
contain
bg_contain
<div class="[modifier class] seal_tiny" style="height:200px;max-width: unset;"><span class="alt">[modifier class]</span></div>