Excel 2016  / 2003 / 2007 / 2010 / 2013

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  How to change the number of sheets for new workbooks

  Excel 2016 automatically creates one worksheet in each new workbook, but you can force it to create as many worksheets as you need.
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  Combining text and formatted values

  The Excel TEXT function enables you to specify numbers and date format.
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  Making a spreadsheet very hidden

  Using the Hide command you can hide the data and formulas from "inquisitive minds". But some of them still can use Unhide command. Nevertheless you can completely hide Excel spreadsheet so that it will be needed some VBA programming to unhide it.
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  Allow specific users to edit ranges in a protected spreadsheet

  Excel offers you an ability to assign user-level permissions to different areas on a protected spreadsheet. You can specify which users can edit a particular range while the spreadsheet is protected. As an option, you can require a password to make changes.
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  Share workbook and track changes

  With Excel built-in tools you can easily work together on workbooks and monitor who, when and what changes made. E.g., track project status and tasks.
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  Protecting workbook elements

  Much like as you can protect elements of each Excel spreadsheet (see Protecting spreadsheet elements for more details), you can protect structure of the sheets in the workbook, prohibiting renaming, moving and other operations.
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  Protecting spreadsheet elements

  Working with large and complex Excel workbooks, especially when entering large amounts of data, no one is protected from accidental changes in formulas, formats and other spreadsheet elements. But you can protect yourself from too much work on finding and eliminating such errors by protecting the individual spreadsheet elements.
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  How to protect spreadsheets

  You can significantly reduce the number of errors in data entry in Excel by protecting changes of specific spreadsheets (worksheets) and cells.
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  View spreadsheets side by side

  Sometimes it is necessary to compare two Excel worksheets. E.g., compare balance sheets for different periods of time. You can do it by comparing worksheets side by side in two automatically linked windows.
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  Changing a spreadsheet tabs color

  Color code is a perfect way to identify content and draw an attention to it. In Excel you can easily change colors of one or more spreadsheet tabs.