style.css e ekleyip deneyin
/* =WordPress Core
-------------------------------------------------------------- */
.alignnone {
margin: 5px 20px 20px 0;
}

.aligncenter,
div.aligncenter {
display: block;
margin: 5px auto 5px auto;
}

.alignright {
float:right;
margin: 5px 0 20px 20px;
}

.alignleft {
float: left;
margin: 5px 20px 20px 0;
}

.aligncenter {
display: block;
margin: 5px auto 5px auto;
}

a img.alignright {
float: right;
margin: 5px 0 20px 20px;
}

a img.alignnone {
margin: 5px 20px 20px 0;
}

a img.alignleft {
float: left;
margin: 5px 20px 20px 0;
}

a img.aligncenter {
display: block;
margin-left: auto;
margin-right: auto
}

.wp-caption {
background: #fff;
border: 1px solid #f0f0f0;
max-width: 96%; /* Image does not overflow the content area */
padding: 5px 3px 10px;
text-align: center;
}

.wp-caption.alignnone {
margin: 5px 20px 20px 0;
}

.wp-caption.alignleft {
margin: 5px 20px 20px 0;
}

.wp-caption.alignright {
margin: 5px 0 20px 20px;
}

.wp-caption img {
border: 0 none;
height: auto;
margin: 0;
max-width: 98.5%;
padding: 0;
width: auto;
}

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