How to Delete Cells and Data in Excel 2010
In Excel 2010, when you need to delete data, remove formatting in a cell selection, or remove entire cells, rows, or columns, you have many options. Excel can perform two kinds of cell deletions in a worksheet: clearing cell data and deleting the cell.
Clearing cell contents
Clearing cells just deletes or empties the cell's contents without removing the cell from the worksheet, which would alter the layout of surrounding cells. To get rid of just the contents of a cell selection, select the range of cells to be cleared and press the Delete key.
If you want to get rid of more than just the contents of a cell selection, like cell formatting or cell comments, follow these steps:
Select the cells containing the content you want to clear.
Click the Clear button (the one with the eraser) in the Editing group on the Home tab.
Click one of the following options on the Clear drop-down menu:
Clear All gets rid of all formatting, comments, and entries in the cell selection.
Clear Formats deletes only the formatting from the cell selection without touching anything else.
Clear Contents deletes only the cell entries; just like pressing the Delete key.
Clear Comments removes the comments in the cell selection but leaves everything else intact.
Clear Hyperlinks removes the active hyperlinks in the cell selection but leaves their descriptive text.

Excel 2010 gives you options for clearing information from a cell.
Deleting cells, rows, or columns
Deleting cells gets rid of the whole kit and caboodle — cell structure along with all its contents and formatting. When you delete a cell (or an entire row or column), Excel has to shuffle the position of entries in the surrounding cells to plug up any gaps caused by the deletion.
To delete the actual cell selection rather than just clear the cell contents, follow these steps:
Select the cells, rows, or columns you want to delete.
Click the drop-down button attached to the Delete button in the Cells group of the Home tab.
Click Delete Cells on the drop-down menu.
The Delete dialog box opens, showing these options for filling in the gaps:
Shift Cells Left moves entries from neighboring columns on the right to the left to fill in gaps created when you delete the cell selection. This is the default option.
Shift Cells Up moves entries up from neighboring rows below.
Entire Row removes all the rows in the current cell selection.
Entire Column deletes all the columns in the current cell selection.

Use Excel's Delete commands to completely eliminate cells and their contents.
To quickly delete an entire column or row from the worksheet, you can right-click the column or row label and select Delete from the shortcut menu (or choose Delete Sheet Rows or Delete Sheet Columns from the Delete button’s menu).
Deleting entire columns and rows from a worksheet is risky business unless you're sure that the columns and rows in question contain nothing of value.

Excel Glossary
active cell
The worksheet cell that contains the cell cursor. Each worksheet can have only one active cell.

Excel Glossary
AutoComplete
A feature that looks at the entries that you make in a worksheet column and automatically duplicates them in subsequent rows whenever you start a new entry that begins with the same letter or letters as an existing entry in that column.

Excel Glossary
AutoCorrect
A feature that alerts Excel 2007 to common typing errors and your own typing errors (that you specify) and tells the program how it should automatically fix them for you.

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AutoFill
An Excel 2007 feature that quickly creates a series of entries based on the data you enter in one or two cells. AutoFill works with days of the week, months of the year, yearly quarters; consecutive series of numbers; and formulas. You also can add your own custom AutoFill series.

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A feature in Excel 2010 that enables you to temporarily hide everything in a table except the records you specifically want to view, based on criteria you specify.

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Backstage view
A new feature in Excel 2010 — accessible from the green File tab — that enables you to manage files and to view the properties and stats about the workbook file you're editing.

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cell
The intersection of a column and row in the worksheet.

Excel Glossary
cell address
The cell identifier, determined by its column letter(s) followed by the row number, as in cell A1, the very first cell of each worksheet at the intersection of column A and row 1.

Excel Glossary
cell cursor
The black border that surrounds the active cell in a worksheet.

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clip art
Readymade drawings, illustrations, and photos offered by Microsoft for use in Microsoft Office applications.

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Compatibility Checker
A utility in Excel 2007 and 2010 that you use to find potential compatibility issues if you plan to save an Excel workbook file in the older Excel 97–2003 file format.

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current cell
The worksheet cell that contains the cell cursor. Each worksheet can have only one current cell.

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data table
A range of cells in a worksheet in which you enter a series of possible values that Excel plugs into a formula so you can perform what-if analysis on the data.

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dialog box
A rectangular window with settings and commands that appears when you click a dialog box launcher or certain other commands on the Ribbon.

Excel Glossary
dialog box launcher
A small icon in the lower-right corner of a group of command buttons on the Ribbon that you click to access a dialog box with additional related settings and commands.

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function
A part of a formula that takes a number of specific arguments and then returns a single value based on those arguments.

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gallery
A drop-down list of thumbnail selections that appears when you click certain command buttons on the Ribbon.

Excel Glossary
group
A section of a tab on the Excel 2007 Ribbon that organizes related command buttons into subtasks normally performed as part of the tab's larger core task. The name of a group appears at the bottom of the group, such as the Font group on the Home tab.

Excel Glossary
hyperlink
Specially formatted text that anyone can click to jump to Web sites, move to other cells or workbooks, or create an e-mail message.

Excel Glossary
keyboard shortcuts
A combination of keys that you can press to execute certain commands, as opposed to finding and clicking the commands' buttons on the Ribbon or elsewhere.

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Live Preview
A feature in Excel 2007 that enables you to point to thumbnails on a drop-down gallery to see how a new font, font size, table style, or cell style would look on your selected data before you actually apply it.

Excel Glossary
macro
A series of commands or actions in Excel that are recorded and saved together in a file. You can run the macro whenever you need to perform the task.

Excel Glossary
Name box
The left-most section of the Formula bar that displays the address or name of the current cell.

Excel Glossary
pivot table
A special type of table unique to Excel 2007 that enables you to summarize large amounts of data and pivot or rearrange the table's data to display different summaries of the information it contains.

Excel Glossary
Ribbon
A new feature of the Excel 2007 interface that replaces the menus and toolbars of previous versions; appears at the top of the Excel window, just below the title bar.

Excel Glossary
ScreenTip
A small window that displays descriptive text when you point to but don't click a command on the Ribbon or other objects in a worksheet.

Excel Glossary
sheet tabs
Small tabs near the bottom of a worksheet that you click to move between the worksheets in a workbook. You can assign descriptive names to sheet tabs.

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slicers
New graphic objects in Excel 2010 that enable you to quickly filter the contents of a PivotTable on more than one field.

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SmartArt
A type of graphic object in Excel 2007 that gives you the ability to quickly and easily construct graphical lists and diagrams in the worksheet.

Excel Glossary
sparklines
Tiny graphs (miniature charts) that fit within a single cell in the worksheet, used to show basic trends in data.

Excel Glossary
Status bar
A horizontal bar that appears at the bottom of the Excel 2007 window and keeps you informed of Excel's current mode. In addition, you can use the Status bar to select a new worksheet view and to zoom in and out on the worksheet.

Excel Glossary
tabs
The various "pages" of Excel 2007's Ribbon interface that you click to display command buttons relating to the tab's name, such as Page Layout and Formulas.

Excel Glossary
template
A pre-designed worksheet that can be used as a basis for creating new worksheets.

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WordArt
Stylized text objects that you use to add pizzazz and emphasis to headings and other text in Excel 2007 worksheets.

Excel Glossary
workbook
The basic file type that you create when you use Excel 2007. A new workbook consists of three worksheets by default.

Excel Glossary
worksheet
The main document that you work in when you enter data into cells within Excel 2007. A worksheet is stored in a workbook file.

Excel Glossary
worksheet area
The portion of an Excel 2007 worksheet in which you enter cell data and add objects such as charts and graphics.

Excel Glossary
XPS XML Paper Specification
A file format developed by Microsoft that enables people to open and print documents in XPS Reader without access to the original programs with which the documents were created (such as Excel).

Excel Glossary
Zoom slider
An object on the Status bar in Excel 2007 that enables you to increase the magnification in a worksheet or shrink it down to get an overall picture of the worksheet data.