If it's over existing data, Excel will ask you first if you want to proceed. Press the Ctrl key before you drag it to copy the data to the new spot so you get a duplicate. If you hold down the Alt key ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Amy Soricelli has over 40 years working with job candidates and has honed the art of the job ...