WordPress: Adds wp-caption-text To CSS File For Image Caption Styling

Question: Is there a WordPress plugin or alternative ways than editing wp-includes/media.php file if I want to format WordPress image caption text?

Answer: Yes. There are many ways to Rome, and editing WordPress core file is certainly not the only solution for this topic.
Indeed, it’s not a good practice to “hack” WordPress core files unless you don’t mind to keep track of mods that you’ve done and happily re-apply the mods during each WordPress upgrade processes.

In WordPress 2.6.1, the Add Media interface automatically enclose image caption in the paragraph tag with a CSS class that named as wp-caption-text (i.e. <p class="wp-caption-text"></p>).

So, the better way of formatting WordPress image caption text is by adding this CSS class (i.e. wp-caption-text) to style.css file of your active WordPress theme.

That’s to say, you might define superscripts CSS style in the wp-caption-text class, so that image caption text will appears in superscripts format. Otherwise, you could also specify a different font style, text colour, underline, etc, so long the image caption text appears differently than post body font style that you’re looking for.

For example, I try to use vertical-align:top; and font-size:xx-small; to achieve superscript style in CSS code as suggested by some references. All you need is to add this block of CSS class to style.css file in your WordPress theme directory:

.wp-caption-text {
        font-size:xx-small;
        color:#00F;font-weight:bold;
        vertical-align:top;
}

And, here are two samples of WalkerNews “trademark” that showing the difference of using HTML superscript tag and CSS superscript definition:

^{Using HTML superscripts and CSS style of superscripts to create WalkerNews trademark.}

Personally, I prefer superscripts style that rendered with HTML <sup></sup> tag.

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