1. From the Lightning App Builder list page in Setup, open an existing record page or create a new one.
2. Add a Tabs component to the page.
3. In the Tabs component properties, click Add Tab.A Details tab is added.
4. Customize the Details tab by clicking it in the properties pane. You can select a different standard label or click Custom and enter the tab name you want.Note Custom tab labels in the Tabs component—including those installed from packages—aren’t translated. For example, if you create a custom “Goals” tab in English, then view the page as a user whose language is set to French, the tab still displays as “Goals”.
5. To add your first component to a tab, select the tab on the canvas and then drop the component directly below it.
6. Reorder tabs in the Tabs properties pane by dragging and dropping them into position. You can’t drag and drop individual tabs on the canvas.