chamilo-lms2/main/inc/lib/javascript/ckeditor/plugins/mapping/css/mapping.css

.map-button {
    background-repeat: no-repeat !important;
    background-position: 5px center !important;
    padding-left: 14px !important;
}

.map-button-pointer {
    background-image: url("../images/selector.png") !important;
}

.map-button-remove {
    background-image: url("../images/remove.png") !important;
}

.map-button-active {
    outline: 1px solid #666 !important;
    background-color: #ddd !important;
}

.map-canvas-drawer {
    height: 310px;
    position: relative;
    overflow: auto;
    width: 468px;
}