Mark Invalid Data/text/scalc/01/06030800.xhpSun Microsystems, Inc.converted from old format - fpecells; invalid datadata; showing invalid datainvalid data;markingMark Invalid DataMarks all cells in the sheet that contain values outside the validation rules.The validity rules restrict the input of numbers, dates, time values and text to certain values. However, it is possible to enter invalid values or copy invalid values into the cells if the Stop option is not selected. When you assign a validity rule, existing values in a cell will not be modified.