drag and drop
You can drag and drop to do just about anything on your Mac: move files and folders to new locations, add a photo to an email message or move a chunk of text in a document. You can also drag items to the Dock or a Finder window sidebar so you can get to them easily.
To drag an item, select it, then press and hold the mouse or trackpad while you drag the item to a new location. Release to drop the item into place.