Lock or unlock columns and rows

If you want to protect key data from being changed or deleted by others who are shared to your sheet, you can lock columns and rows. Data contained in cells in locked rows or columns cannot be edited. Similarly, cells in newly inserted rows won't be editable in locked columns. Locked columns and rows also apply to anyone working from an update request or published sheet.

You can lock any column or row except the attachment and comment columns. 

Another way to protect your data is to use the proper sharing permissions when you share your sheet (for example, share a sheet to someone with Viewer permissions rather than Editor permissions if you don't want them to be able to make changes).

You can create rules that lock rows automatically when specific conditions are met. Learn more about automating your work with alerts and actions.

Lock a column or row

To lock a column, right-click the column header and click Lock Column.
 

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Locking a column doesn't prevent a person with editor sharing permissions from deleting or moving rows. It prevents them from editing or deleting any data in that column.

To lock a row, right-click a row number and click Lock Row.

A lock icon will appear in the column or row headers to indicate that a column or row has been locked.

Unlock a column or row

To unlock a row:

1. Right-click on a row's number and select Unlock Row. (Or, click the lock icon in the row’s Lock column.)
2. In the message that appears requesting your confirmation to unlock it, select OK.

To unlock a column:

1. Right-click the column header and select Unlock Column (or click the lock icon under the column header).
2. In the message that appears requesting your confirmation to unlock it, select OK.