Google and their develop team always like to give us a surprise! Yes, Gmail has rolled out Drag-and-Drop file attachments features. It is a very simple feature but surely very useful. Now this new feature be support on Firefox 3.6 and Google Chrome users. Google said it will “enable this for other browsers as soon as they support this feature.
Many people don’t like browsers based web-mail because there are no Drag-and-Drop file attachments support, if they want to attach a file, they must click “Attach a file”, then select the files. Now, they can discard the email clients like Microsoft Outlook and come to Gmail.
Users can drag-and-drop photos, documents, spreadsheets and other files from their computer to Gmail now, a box will appears with heading “drops files here’.
But folder not be supported. If you try to drag a folder, the following error will be returned.
"This does the exact same thing as ‘Move to’ — it labels and archives in one step,"
"You can drag labels onto messages too. It’s the same thing as using the ‘Label’ button."
In addition, there is a Firefox plugin named dragdropupload addin for Firefox which can do the same, but that’s only for Firefox users.
Drop files into attachment boxes instead of browse for them or type in the filename. Drop multiple files and fill all the entries. In some websites it allows to add new upload files: in Gmail is possible to drop the files directly over the “Attach a file” link.
The feature “Calendar Invitations to Gmail messages” also be enabled, It will allow you to create Calendar events from with Gmail.
Here is official Gmail blog you can read more: Drag and drop attachments onto messages