Unprotect /text/swriter/01/05100400.xhp

Unprotect

Removes the cell protection for all selected cells in the current table.
To remove the protection from several tables at once, select the tables, and then press Command Ctrl+Shift+T. To remove the protection from all of the tables in a document, click anywhere in the document, and then press Command Ctrl+Shift+T. You can also remove cell protection from a table in the Navigator.