Most email programs support dragging attachments directly as files from an email message into other applications. In particular into the image attachment icon in a MoneyWorks transaction to archive an invoice PDF or JPEG.
The exception is Microsoft Outlook, which won’t directly deliver a file when you drag an attachment’s icon. However there is a workaround:
On Windows: This Outlook extension fixes Outlook’s drag functionality to allow attachments to be dragged to any application, including MoneyWorks.
On Mac: To copy an attached image file to a MoneyWorks transaction, double-click the attachment — this will open it in Preview. Now click on the small icon in the Preview window title bar and drag that into MoneyWorks and drop it on the Image attachment icon of the transaction entry window.