picture_wysiwyg.css in Picture 7

/* This CSS file needs to be included either in the theme used for
* editing content in order to be included in the WYSIWYG edit iframe,
* or specifically included in the WYSIWYG config page's
* "Define CSS" textfield.
*/
span[data-picture-align="left"], img[data-picture-align="left"]  {
  float: left;
}
span[data-picture-align="right"], img[data-picture-align="right"]  {
  float: right;
}
span[data-picture-align="center"], img[data-picture-align="center"]  {
  display: block;
  margin-left: auto;
  margin-right: auto;
}
/* Remove ugly boarders that bunch up in the image dialog table. */
.cke_dialog_body tr td:last-child {
  border-right: 0px;
}
/* The following is an example of what you could put in your theme
 * to control the size of images. It is formatted as
 * span[data-picture-group="[The machine name of your picture group]"
span[data-picture-group="wide"] {
  width: 100%;
}
span[data-picture-group="normal"] {
  width: 50%;
}
span[data-picture-group="narrow"] {
  width: 33%;
}
span[data-picture-group] img {
  width: 100%;
  height: auto;
}*/