Once you have activated CloudApp in Sparrow, here are the basics of how it works:

• Dragging and dropping attachments in the composer will directly upload it with CloudApp.
• Dropping an attachment to the bottom of the compose window will attach the file the classic way.

• Using the Attachment button in the top-left corner will always upload files the old classic way.

• Dragging and dropping attachments on Sparrow’s dock icon will opens a new composer and upload the file with CloudApp.

• Pressing ‘Cmd’ while dragging and dropping a file in the composer will attach it the classic way.