Basic Tree DataYou can add buttons to rows or toolbar by using actions prop. Actions prop takes array of actions.Usage#import MaterialTable from "@material-table/core"; <MaterialTable // ... parentChildData={(row, rows) => rows.find((a) => a.id === row.parentId)}/>;CopyLive Demo#noteSee here for more on the GLOBAL_VARS we use in our demosLive Editorfunction BasicTreeData() { return ( <MaterialTable data={TREE_DATA} columns={TREE_COLUMNS} parentChildData={(row, rows) => rows.find((a) => a.id === row.parentId)} options={{ selection: true, }} /> ); }function BasicTreeData() { return ( <MaterialTable data={TREE_DATA} columns={TREE_COLUMNS} parentChildData={(row, rows) => rows.find((a) => a.id === row.parentId)} options={{ selection: true, }} /> );}Result