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.