An Excel workbook file can hold any number of sheets, and these sheets can be
either worksheets (sheets consisting of rows and columns) or chart sheets (sheets that hold a single chart). A worksheet is what people usually think of when they think of a spreadsheet. You can open as many Excel workbooks as necessary at the same time.

Figure 14-1 shows Excel with four workbooks open, each in a separate window. One of the windows is minimized and appears near the lower-left corner of the screen. (When a workbook is minimized, only its title bar is visible.) Worksheet windows can overlap, and the title bar of one window is a different color. That’s the window that contains the active workbook.

FIGURE 14-1
You can open several Excel workbooks at the same time.

The workbook windows that Excel uses work much like the windows in any other Windows program. Each window has three buttons at the right side of its title bar. From left to right, they are Minimize, Maximize (or Restore), and Close. When a workbook window is maximized, the three buttons appear directly below Excel’s title bar.

Excel’s windows can be in one of the following states:

• Maximized: Fills Excel’s entire workspace. A maximized window doesn’t have a title bar, and the workbook’s name appears in Excel’s title bar. To maximize a window, click its Maximize button.
• Minimized: Appears as a small window with only a title bar. To minimize a window, click its Minimize button.
• Restored: A nonmaximized size. To restore a maximized or minimized window, click its Restore button.

If you work with more than one workbook simultaneously (which is quite common), you have to know how to move, resize, and switch among the workbook windows.

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