.DescartesToolBar .DescartesToolSelectionCircleSelectionItemInactive,.DescartesToolBar .DescartesToolSelectionCircleSelectionItemActive {
    background: url("img/icon_roi_ellipse.png") no-repeat center;
}

.Descartes-tooltip-selection {
    opacity: 1;
    font-weight: bold;
}
.Descartes-tooltip-selection:before {
    border-top: 6px solid rgba(0, 0, 0, 0.6);
    border-right: 6px solid transparent;
    border-left: 6px solid transparent;
    content: "";
    position: absolute;
    bottom: -6px;
    margin-left: -7px;
    left: 50%;
}