To enable or disable cell protection for a worksheet, use Tools > Cell Protection. A password of at least six characters is required.

Once protection is active, use Format > Protected to toggle protection for individual cells. Protected cells cannot be deleted.

Each time you protect or unprotect cells, you must enter the defined password.

Note: If the workbook is not encrypted, someone with full access to the file can change these settings using other *.ods‑compatible software.