One mistake that is often made in spreadsheets containing lots of data and formulas, is the accidental placement of numbers in a cell instead of the formula. It is a painful task to examine each and every cell one at a time to verify that the proper cells are using the proper equation. In addition, verifying that the cells referenced in the equations are correct can be equally overwhelming. Fortunately, Calc allows you to show the formulas of the entire spreadsheet so that you can more easily check your work.
1. Click Tools and select Options.
2. In the left pane of the Options window, expand OpenOffice.org Calc.
3. Select View.
4. In the Display section, check the Formulas checkbox.
5. Click OK.
To go back to viewing the calculated values, simply repeat the above steps and uncheck the Formulas checkbox.