Excel search for cell references in formulas

Question

I inherited a big model and have been trying to reverse engineer some of the formulas. There are a lot of fields. I am not sure if everyone of them is necessary.

Is it

Answer 1

Tools > Formula Auditing > Trace Precedents or Trace Dependents (Excel 2003)

Formulas > Trace Precedents or Trace Dependent (Excel 2010)

Answer 2

I bought the add-in Formula Manager to do this.
If you want to do it yourself, you'll have to implement it in VBA.

Answer 3

Search > Options > Within: Workbook > Look in: Formulas

The upside is that you can broaden the search for example by omitting the row number, or narrow it by including pieces of a formula you want to find. For an inherited file I would Find All '='.

The downside is you have to check with and without dollar signs, a total of four searches for the original example.