This extension allows you to choose the identity of your new email from a popup menu directly from the Write button. This feature behaves in a similar manner as the Get Mail pulldown menu. In addition, the default behavior of the Write button is now context sensitive! The new message will automatically assume the default identity of the account that owns the currently selected folder. Please note that the global Inbox is not owned by any account and the default behavior of the Write button is unaffected when any subfolder of the global Inbox is selected.