If you want to place the copy in a form on your server here and now, you may copy it in the Designer via the browser memory – much like the standard copy-and-paste process via the Clipboard. Use the Copy option on the File menu to copy the form content, then open the target form in Designer and paste in the copied content via the Paste option the File menu. This is described in Designing: 2.2 The File menu.
To keep a form copy in a separate file and use it now or later, or on another server, you can use the Export function in the Dashboard. This will create a file that you can import into the same server, or send it away to be imported to another server’s Dashboard. See Managing: 4.6 Export and import of Zegeba forms and folders.