Which feature would you use to prevent unauthorized users from editing a sheet?

The ability to prevent unauthorized users from editing a sheet is effectively addressed by locking specific columns or rows. When columns or rows are locked, users who do not have the appropriate permissions are restricted from making any changes to those designated parts of the sheet. This feature is particularly useful for protecting critical data within a sheet while still allowing other users to access and work with different areas of the sheet that are not locked.

In contrast, while sharing settings and access control levels are important for managing how users interact with the entire sheet, they do not provide the granularity needed to safeguard specific parts of the sheet. Version history allows users to revert to earlier versions of a sheet but does not prevent edits. Therefore, locking specific columns or rows stands out as the most effective option for controlling access at a more detailed level within a Smartsheet.