Enter a value in the field next to "Decimal Places" to indicate how many digits Excel should display after decimal points. For example, if you select "2," the value "100" becomes "100.00." ...

Perhaps the first visual improvement should expose negative values—and it should really stand out. You can do so as follows: Select the sparklines; that’s H3:H8.

Excel's chart features can turn your spreadsheets into ... of positive numbers. Negative values cannot be charted, and zero values should be ... 4. 3D Line charts display each row/column of data ...