Stacks
Vertical
Horizontal
Spacers
Gap
Margin
<h4 class="h5 text-muted mt-3">Gap</h4>
<h4 class="h5 text-muted mt-3">Margin</h4><h4 class="h5 text-muted mt-3">Gap</h4>
<h4 class="h5 text-muted mt-3">Margin</h4>
<h4 class="h5 text-muted mt-3">Gap</h4>
<h4 class="h5 text-muted mt-3">Margin</h4>