How to add Columns In Google Sheets Past Z is shown in this video. To add more Columns in Google Sheets to left or right click on the column and your will see two options "Insert 1 column Left" and "Insert 1 Column Right". Click on any of the desired option to insert an extra new column in Google Sheet. If you want to insert multiple columns then repeat the process multiple times
0:00 Whats in Video
0:11 Method 1
0:35 Method 2