Unlike in previous versions, number of Undo levels in Excel 2010 is 100 - the biggest number that can be used.
If you prefer to avoid the empty workbook to be created when Excel starts up, you can do so by editing the command line that is used to start Excel.
Excel automatically creates three worksheets in each new workbook, but you can force it to create as many worksheets as you need.
If you would like to better understand how some of these complex array formulas work, consider using a handy tool - Formula Evaluator:
You can easily count the number of unique values of the range using a simple formula.
In order to get unique items in a range you can use the Advanced Filter to extract the unique values from a column of data and paste them to a new location.
When you need as much space as possible on screen to view a workbook, you can collapse (or minimize) the Ribbon to only its labels by double-clicking the label of the tab you're currently using.
Suppose you'd like to add a couple more commands to the Quick Access toolbar. Also, say you're a big fan of AutoSum. You can add the AutoSum button to the Quick Access toolbar, so you can quickly create and use AutoSum entries.
Candlestick chart is a style of bar-chart used primarily to describe price movements of a security, derivative, or currency over time. This chart type is often used in combination with the volume bars chart for technical analysis of stock and foreign exchange patterns.