If checked, the cell content will be protected. This is the default behavior. You need to protect the whole sheet using the Tools- > Protect document- > Protect Sheet... menu option for this individual cell protection to work. See the manual for more details in the Advanced KSpread chapter. When a cell is protected, its content cannot be changed.
Пры ўключэнні гэтага параметру і абароне ліста або дакумента змесціва абароненых вочак будзе немагчыма змяніць.