There is something we call full-bleed image in the Blog II template, that includes a caption, as you can see on our demo blog post here:
Even if this cannot be achieved with a drag-and-drop option, because this is part of the post content, we still wanted to add the possibility to insert full-bleed images in the post content. So this can be achieved only with code, but it's a matter of copy/paste, nothing complicated:
<div class="full-bleed img-full-width mt100">
<img class="img-full-width"
src="https://cdn2.hubspot.net/hubfs/273774/mp/themes/Act-Theme/images/act2-blog-post-middle-image1.jpg"
alt="Planning">
</div>
<div class="mt30 mb50 text-small o60 tc">( Planning is Everything )</div>
Also, the small text below can be edited inline: