Since WordPress version 2.6, WordPress has added a built-in shortcode, “Caption”, which will be automatically rendered and translated into standard HTML CSS code to display the caption for the photo or image, which saved via media uploader, beneath it.

However, when WordPress appends the DIV styles to print the caption title under the picture or image, WordPress makes use of default alignment, color, font, spacing, and other styling attributes to display the image captions.

The default CSS styles for image with the caption may potentially breaks the blog or web page layout, does not validate against W3C xHTML standard, appears too closely with the text with no spacing in the post or page, or does not align as author’s wish.

For blogger who wants to modify the CSS styles of the caption that shows the image captions on screen after parsing the shortcode, add the following CSS code into the active theme’s style.css file:

/* Captions */
.aligncenter,
div.aligncenter {
display: block;
margin-left: auto;
margin-right: auto;
}

.wp-caption {
border: 1px solid #ddd;
text-align: center;
background-color: #f3f3f3;
padding-top: 4px;
margin: 10px;
-moz-border-radius: 3px;
-khtml-border-radius: 3px;
-webkit-border-radius: 3px;
border-radius: 3px;
}

.wp-caption img {
margin: 0;
padding: 0;
border: 0 none;
}

.wp-caption p.wp-caption-text {
font-size: 11px;
line-height: 17px;
padding: 0 4px 5px;
margin: 0;
}
/* End captions */

Above HTML CSS declaration is taken from WordPress 2.6 default theme. These newly added CSS styles are used to control and assign the appearance of the caption for the image posted on blog. Modify the code above in “style.css” file according to your own preference to have your own design and look.

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