Gmail is getting better and better every day. Always they come with some cool features to make it more user friendly. It almost have all the desktop email client programs has. Now you can drag and drop the attachments directly to desktop. Simple feature but makes your life easy. Dragging and dropping files is an easy way to save time in Gmail. We’ve previously blogged about dragging files to upload as attachments and dragging images into new messages. Now, if you're using Google Chrome, you can also drag attachments out of messages you receive to save them to your computer.
Drag and drop attachments to save them to your desktop - Official Gmail Blog