Is there a way to 'lock' a cell with data / formulas already entered in such a way that it is able to be altered but when you press delete or backspace it reverts to the previously entered 'locked' content.
I need this as some cells I have entered need to contain complicated formulae as well as be there own input for other cells.
(Attempting to create Rota's for my employer that calculate breaks etc on there own but I can't use other software.)
Edit: - I can't use protection because I need the cell to be edited if needed and then revert back to the formula if it is no longer needed for manual input.