Finder sidebar
Finder windows have a sidebar that provides quick access to items you use frequently.
If you don’t see the sidebar, press Control-Command-S.
The sidebar is divided into four sections: Favorites, iCloud, Locations, and Tags. If you don’t see any items in a section, they may be hidden—click  at the right of the section to reveal any hidden items.
 at the right of the section to reveal any hidden items.
To customize the Finder sidebar, click  in the Dock, choose Finder > Settings, click Sidebar, then select the items you want to see in each section.
 in the Dock, choose Finder > Settings, click Sidebar, then select the items you want to see in each section.