Multiple “sheets” in Pages

Although the sheets terminology is correct in a spreadsheet application like Numbers, the ability to have multiple Pages documents open in tabs is possible. Open multiple Pages documents by double-clicking them. You will now have multiple open Pages documents on your Desktop.

Click any one of the open documents to select it, and then from the Pages Window menu, select Merge All Windows. Now, you have one Pages window, with tabs for each of the opened documents available just below the toolbar. The Pages User Guide has more information on using multple tabs in a Pages document.