halcyon/widgets/overlay_caption.php

<div class="caption_status invisible">
<header class="caption_status_header">
<span><?=_('Add a caption to the media file')?></span>
</header>
<form id="caption_status_form" name="caption_status_form" class="status_form">
<div class="status_main">
<div class="status_textarea">
<textarea name="status_textarea" placeholder="<?=_('Please describe what you can see in the picture.')?>"></textarea>
</div>
</div>
<div class="status_bottom">
<div class="submit_status_label_wrap">
<span class="character_count">
</span>
<label for="caption_status_form_submit" class="submit_status_label">
<div class="toot_button_label disallow_select">
<i class="fa fa-check" aria-hidden="true"></i>
<span><?=_('Save')?></span>
</div>
</label>
</div>
<input id="caption_status_form_submit" class="submit_status" type="button" class="invisible">
</div>
</form>
</div>