/* Center on Page */
td#MSOTlPn_MainTD
{
    position: fixed;
    width: auto !important;
    left: 20%;
    right: 20%;
}
td#MSOTlPn_MainTD > table.ms-ToolPaneOuter, table.ms-TPBorder
{
    width: 100% !important;
}

/* Enable Tabs */
div.ms-TPBody
{
    display: flex;
}