This macro is coded for column A; adjust to suit your needs:

Private Sub Worksheet_Change(ByVal Target As Range)
Set t = Target
Set a = Range("A:A")
Dim s1 As String
Dim s2 As String
s1 = ","
s2 = s1 & Chr(10)
If Intersect(t, a) Is Nothing Then Exit Sub
Application.EnableEvents = False
t.Value = Replace(t.Value, s1, s2)
Application.EnableEvents = True
End Sub

It goes in the worksheet code area. Because it is worksheet code, it is
very easy to install and use:

1. right-click the tab name near the bottom of the window
2. select View Code - this brings up a VBE window
3. paste the stuff in and close the VBE window

If you save the workbook, the macro will be saved with it.

To remove the macro:

1. bring up the VBE windows as above
2. clear the code out
3. close the VBE window

To learn more about macros in general, see:

http://www.mvps.org/dmcritchie/excel/getstarted.htm

To learn more about Event Macros (worksheet code), see:

http://www.mvps.org/dmcritchie/excel/event.htm

--
Gary''s Student - gsnu200807


"vertblancrouge" wrote:

Hi

I know I can perform a manual line break in a cell by pressing ALT+ENTER,
but is there a way to do this automatically after a space or a specific
caracter?

I get a report generated from another software and column A lists different
tags. There can be up to 10 different tags within one cell and all thos tags
are separated by a comma.

How can I tell Excel to automatically insert a line break after evey commas
in the cells of column A?

Thanks