MS Excel
You can use the drag and drop method to

Move cell contents
Copy cell contents
Add cell contents
Copy cell contents & Move cell contents

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MS Excel
How do you select an entire column?

Click the column heading letter
Hold down the Ctrl key as you click anywhere in the column
Select Edit > Select > Column from the menu
Hold down the shift key as you click anywhere in the column

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MS Excel
You can auto fit the width of column by

Double clicking on column right border on column header
Double click on the cell pointer in worksheet
Double clicking on the column left border of column header
Double clicking on the column name on column header

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