Right-click on the sheet tab, two new context menu items are available.
Paste as New Sheet
Use Copy Sheet to copy current sheet with all information(including the header lines and structure) into the clipboard, and then use Paste as New Sheet to paste it as a new sheet from the clipboard into a new layer or new window.
LabTalk command is also provided,
clip -cs; /// copy active sheet
clip -ps; /// paste sheet to active book from clipboard, if possible
clip -psn; /// paste sheet to new book from clipboard, if possible