That control can only be used while the worksheet is displayed in a separate window. Do you want to open a window for the ...

That control can only be used while the worksheet is displayed in a separate window. Do you want to open a window for the worksheet?• Click Yes to open a separate window in which you can edit the worksheet and use the control. When you are finished, click Save and then click Exit to return to the original window.• To continue working in the current window without using the control, click No.