Add Finder's buttons to the toolbar
Right-click the toolbar and choose Customize Toolbar…. Drag in Path, Eject, New Folder, Delete, Connect, Get Info, Quick Look, Preview or AirDrop.
How to do it
- Right-click an empty part of the toolbar and choose Customize Toolbar…, or choose View ▸ Customize Toolbar….
- Drag the buttons you want into the toolbar, such as Get Info or New Folder.
- Drag a button out of the toolbar to remove it, or drag the default set back in.
- Click Done. Every window uses the new toolbar.
More detail in the guide: Browsing files