1, through the command+ click on the new window to open the Finder side bar item
Once you have clicked the Command key, click on any item on the Finder's sidebar so that you can open it in a new Finder window. This operation can be applied to any sidebar items, including collections, shares, and devices. This feature is useful when we want to copy or move files between two windows.
2, command+ mouse Drag can move the rear of the window, without affecting the front window
Want to see the window in the background, but don't want to lose control of the front window? Through command+ drag and drop can be achieved.
3, command+ Click the icon on the Dock to open the location of the application in the Finder
To know where the application in the Dock is stored in the OS X file system, just click Command+. This feature is not limited to applications, as long as the contents of the OS X Dock are available, including documents, folders, and so on.
4, command+ return Spotlight search results can be directly viewed in the Finder
As with the Dock operation, when using Spotlight search, you can open the location of the file in the search results by simply command+ carriage return. Direct return will open the file.
5, use Command key to select nonadjacent files