An excel document, to insert a new column to the left of a specific column, right-click the header indicating the letter of the column and select........?

"Insert"

To insert a new column to the left of a specific column in Microsoft Excel, you can follow these steps:

1. First, open the Excel document that you want to work with.
2. Locate the column to the right of which you want to insert a new column.
3. Move the cursor to the header of the column, where the letter representing the column is displayed.
4. Right-click on the header of that column.
5. A context menu will appear. From the context menu, select the option "Insert" to open a submenu.
6. In the submenu, click on the option "Insert Sheet Columns".

By following these steps, you will be able to insert a new column to the left of the specific column in your Excel document.

To insert a new column to the left of a specific column in Excel, right-click the header indicating the letter of the column and follow these steps:

1. Right-click on the header of the column that is to be moved to the right.
2. In the contextual menu that appears, select "Insert" from the options.
3. A new column will be inserted to the left of the selected column, pushing the existing columns to the right.
4. You can now enter data or adjust the column properties as needed.

That's it! The new column will be inserted to the left of the specific column you selected.