Settings in Excel 2013
Increase the number of Undo levels in Excel
Like in version 2010, number of Undo levels in Excel 2013 is 100 - the biggest number that can be
used.
Recalculating the worksheet
If you are working with huge workbooks that contain a very large number of formulas, functions, and data,
you can turn off the automatic recalculation.
Entering decimal points automatically
If you need to enter lots of numbers with a fixed number of decimal places, Excel has a useful tool:
How to change default font
This setting enables you to select a different font and font size for your worksheets.