Customise the Finder sidebar on Mac
You can choose what you want to see in the Finder sidebar.
On your Mac, click the Finder icon
in the Dock to open a Finder window.Do any of the following:
Hide or show the sidebar: Choose View > Hide Sidebar or View > Show Sidebar in the menu bar. (If Show Sidebar is dimmed, choose View > Show Toolbar.)
Resize the sidebar: Drag the right side of the divider bar to the right or left.
Change what’s in the sidebar: Choose Finder > Settings, click Sidebar, then select or unselect items.
Rearrange items in the sidebar: Drag an item to a new location.
Show or hide all the items in a section of the sidebar: Position the pointer over the section heading until the Hide button
or the Show button 
appears, then click the button. For example, to temporarily hide your Favourites, position the pointer over the Favourites heading in the sidebar, then click the Hide button .Add a folder or disk to the sidebar: Drag the item to the Favourites section. If you don’t see the Favourites section, choose Finder > Settings, click Sidebar, then select at least one item in the Favourites section.
Adding an item to the Finder sidebar only creates a shortcut to the item; the item isn’t moved from its original location.
Add a file to the sidebar: Press and hold the Command key, then drag the file to the Favourites section. If you don’t see the Favourites section, choose Finder > Settings > Sidebar, then select at least one item in the Favourites section.
Adding a file to the Finder sidebar only creates a shortcut to the file; the file isn’t moved from its original location.
Add an app to the sidebar: Press and hold the Command key, then drag the app icon to the Favourites section.
Remove an item: Drag the item’s icon out of the sidebar until you see the remove sign
.The link to the item in the sidebar disappears, but the item remains in its original location on your Mac.
To change other Finder settings, choose Finder > Settings. See Change Finder settings.