Outlining Cells Referenced in a Formula

When Fraser selects a cell that contains a formula and then clicks in the Formula bar, any cells referenced in the formula are outlined in different colors. This makes Fred wonder if it is possible to outline cells in this manner without the need to click in the Formula bar. He would find it helpful to have the outlining just when a cell is selected.

Your first thought might be that you could create a macro to do what Fraser wants. The problem is, the macro would be quite complex, as it would need to evaluate the contents of the cell and then provide the desired outlining. (Figuring out which colors to use would be a headache, plus you couldn't highlight the cell references in the formulas in color.) Also, there needs to be a way to remove the outlining when moving to a different cell. Finally, when you are in Edit mode (as when you click in the Formula bar), then all bets are off because you can't run macros.

No, it is simpler to remember what is happening when you click in the Formula bar—as already mentioned, you are putting Excel into Edit mode so that you can edit the contents of the cell. There are two very common ways to switch to Edit mode: click in the Formula bar (as Fraser did) or simply press F2. Thus, a quick way to see the outlining that Fraser enjoys would be to press F2. When done, press Esc and Edit mode is exited.

It is possible, of course, to use a macro to kick you into Edit mode whenever you select a cell. Here's an example of one that will do it:

Private Sub Workbook_SheetSelectionChange(ByVal Sh As Object, _
  ByVal Target As Range)
    If Target.HasFormula Then
        Application.SendKeys ("{F2}")
    End If
End Sub

The macro, which should be stored in the ThisWorkbook module, implements an event handler that is executed every time the selection changes. The code then checks to see if the cell contains a formula, and if it does, then the F2 key is stuffed into the keyboard buffer and Excel goes into Edit mode. This macro effectively automates the manual pressing of the F2 key. (Personally, for me, I would find it easier to just press F2 in those instances when I want to look at the outlining.)

There is another thing you might find helpful. Excel has this obscure little feature that allows you to select the cells referenced in a formula. To see how this works, select the cell containing the formula and then press Ctrl+[ (that's the left bracket). You should see that Excel creates a selection set that consists of the cells referenced in the formula. Since this is actually a selection set, the original cell you were in (the one containing the formula) is no longer selected.

On our Office 365 systems, the same effect is attained by simply double-clicking on the cell containing the formula. On older versions of Excel, double-clicking a cell may result in actually going into Edit mode instead of creating the selection set from the formula in the cell.

Finally, you can also use the auditing tools in Excel to see which cells are related to the current cells. Describing how to use all of the auditing tools is beyond the scope of this tip, but you can explore them by displaying the Formulas tab of the ribbon and working with the tools in the Formula Auditing group.

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (7336) applies to Microsoft Excel 2007, 2010, 2013, 2016, 2019, and 2021.