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On account record pages, the Actions dropdown menu includes the View Account Hierarchy action unless you customized the Salesforce1 and Lightning Experience Actions section of the account page layout before Spring ’17. In that case, add the action to your account page layout.
Your users can expand or collapse parts of a hierarchy as they navigate it. They can view up to 2,000 accounts from each point where they enter a hierarchy.
By default, account hierarchies display the same columns as the Recently Viewed Accounts standard list view. But if the hierarchy columns don’t show the information that your sales reps need, you can customize them independently of the list view. In Setup, in the Quick Find box, enter Object Manager and then click Object Manager. In Account, click Hierarchy Columns, and then edit the columns.
Under Columns Displayed, add or remove fields.