how to open multiple excel workbooks at the same time?
['First, open two or more workbooks.', 'On the View tab, in the Window group, click Arrange All.', 'Select the desired arrange setting. ... ', 'Click OK.', 'On the View tab, in the Window group, click View Side by Side (by default, Synchronous Scrolling is activated), to scroll both workbooks at the same time.']