To insert a column, pick any cell in the table and right-click. In the example shown below for rows, a row will be inserted above row 3. For columns, if you have a cell selected in the table's …

If you need to sum a column or row of numbers, let Excel do the math for you. Select a cell next to the numbers you want to sum, select AutoSum on the Home tab, press Enter, and you're done.

To insert a single column: Right-click the whole column to the right of where you want to add the new column, and then select Insert Columns. To insert multiple columns: Select the same …

The Subtotal command will appear grayed out if you are working with an Excel table. To add subtotals in a table, you must first convert the table to a normal range of data, and then add …

Insert a new column into the table. You can do this by typing in the column immediately to the right of the table, and Excel will automatically extend the table for you.

When your data is in a table, then as you add or remove items from the list, any drop-downs you based on that table will automatically update. You don't need to do anything else.

One quick and easy way to add values in Excel is to use AutoSum. Just select an empty cell directly below a column of data, then on the Formula tab, select AutoSum > Sum.

This article shows you how to automatically apply shading to every other row or column in a worksheet.

With Power Query, you can add an Index or Custom (you define the formula) column to your current query.

On the worksheet that contains your chart data, in the cells directly next to or below your existing source data for the chart, enter the new data series you want to add.