CocoRoboDesktop/kityminder-editor/less/topTab/idea/operation.less

.operation-group {
    width: 64px;
}

.edit-node {
    .km-btn-icon {
        background-position: 0 -60px;
    }
}

.remove-node {
    .km-btn-icon {
        background-position: 0 -80px;
    }
}