Excel 2003

[htown]

I have 1000 rows and 20 columns, and used the three variables in sort.

Is there a formula that will insert a bold line after a particular column
changes staying within the confines of the chart?

 

[Pete_UK]

A formula cannot return a line, bold or otherwise. You will need a
macro to do that.

Hope this helps.

Pete

 

[Bob I]

What do you mean "changes staying within the confines of the chart"

As far as underlining a cell you can use conditional formatting.