... 2:49 PM236Index Excel Options dialog boxchanging Excel user name, 213customizing Excel, 20–21Quick Access Toolbar, 12–13Ribbon, 14–15ways to open, 21exiting Microsoft Excel, 7exponentiation ... 40referencingin another workbook, 127in another worksheet, 126–127 Excel program, 6–7new worksheet, 134–135workbook, 153operandin Excel formula, 112function as, 116–117operatorsarithmetic, ... are also using a workbook online?When you open a workbook using the Excel Web App, examine the lower right corner of the Excel screen. If you see 1 person editing, it means you are the only...