.annotator-png-container-annotation {
    position: relative;
    border: 1px solid #ccc;
    margin: 20px auto;
}
.annotator-png-canvas-annotation {
    border: 1px solid #ccc;
}
.annotator-png-toolbox {
    margin-bottom: 10px;
}
button {
    margin-right: 5px;
}