The other option would be to write a comment to every cell containing a formula, and then display the comment. This then gives you an easy option to switch on and off using view/comments. Gets a bit messy with lots of contiguous cells with formulas, but no more so than anything else.
Sub Formulas()
Dim cel As Range
On Error Resume Next
Application.ScreenUpdating = False
For Each cel In ActiveSheet.UsedRange.SpecialCells(xlCellTypeFormulas, 23)
With cel
.AddComment
.Comment.Visible = True
.Comment.Text Text:=.Formula
End With
Next cel
Application.ScreenUpdating = True
End Sub
Regards
Ken.....................