You can learn how to add a column to a spreadsheet with this guide.
Step 1: In a web browser, go to sheets.google.com.
There is a list of spreadsheets you have worked on.You will be prompted to sign in to your account if you are not already signed in.
Step 2: You can open the spreadsheet to modify it.
If the file is already in your Drive, you'll see it in the list.Click its name to open it.Click the gray folder at the top-right corner of the file list if it's on your computer.Click if you want to modify the file.To create a new spreadsheet, click the box with an "+" at the top- left corner of Sheets, then add your data.
Step 3: The letter is above the column.
Before or after the location where you want to insert a new column is what you should choose.A menu will appear.
Step 4: Click left or right to insert.
Depending on where you want the new column to go, you have two options.The left or right side of the current column will show the new column.A blank column can be created to the left of the selected column.To the right of the selected column, choose to create a blank column.