Images
Default
Responsive
Rounded
Thumbnail
Alignment
Float
Spacing utilities
Text alignment
<h4 class="h5 text-muted mt-3">Float</h4>
<h4 class="h5 text-muted mt-3">Spacing utilities</h4>
<h4 class="h5 text-muted mt-3">Text alignment</h4><h4 class="h5 text-muted mt-3">Float</h4>
<h4 class="h5 text-muted mt-3">Spacing utilities</h4>
<h4 class="h5 text-muted mt-3">Text alignment</h4>
Picture element
If using the <picture> element put .img-* classes on the <img> tag and not the <picture> tag.