Customize the Finder toolbars on Mac
There are several ways to customize the Finder toolbar and Finder sidebar.
Customize the toolbar
On your Mac, click the Finder icon
in the Dock to open a Finder window.Do any of the following:
Hide or show the toolbar: Choose View > Hide Toolbar, or View > Show Toolbar, in the menu bar.
Hiding the toolbar also hides the sidebar, and moves the status bar from the bottom to the top of the window.
Resize the toolbar: If you see the More Toolbar Items button
at the right end of the toolbar, it means the window is too small to show all of the toolbar items. Enlarge the window or click the button to see the rest of the items.Change what’s in the toolbar: Choose View > Customize Toolbar in the menu bar. You can drag items into and out of the toolbar, add a space between items, and choose whether to show text with the icons.
Rearrange the items in the toolbar: Press and hold the Command key, then drag an item to a new location.
Add a file or an app: Press and hold the Command key, then drag the item to the Finder toolbar until you see a green plus sign.
Remove an item: Press and hold the Command key, then drag the item out of the toolbar.
Customize the 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 > Preferences, click Sidebar, then select or deselect 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 Favorites, position the pointer over the Favorites heading in the sidebar, then click the Hide button .Add a folder or disk to the sidebar: Drag the item to the Favorites section. If you don’t see the Favorites section, choose Finder > Preferences > Sidebar, then select at least one item in the Favorites 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 Favorites section. If you don’t see the Favorites section, choose Finder > Preferences > Sidebar, then select at least one item in the Favorites 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 Favorites 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.
Customize scrolling
On your Mac, choose Apple menu
Click General
.Select options for when to show the scroll bar and what action to take when you click in the scroll bar.
The scrolling behavior applies to Finder and other windows.
To change other Finder preferences, choose Finder > Preferences. See Change Finder preferences.