No need for a macro, this is relatively easy to change.

First, go to Insert - Name - Paste. Choose to "Paste List".

Second, select the cells containing the formulas, and do a find & replace to
change P400 to Z400.

Finally, select the group of cells with names and formulas, and goto Insert
- Name - Create. Define Name labels as left column. Replace old name
definitions.


If this is something that you would need to do often, you could record this
as a macro, I suppose.
--
Best Regards,

Luke M
*Remember to click "yes" if this post helped you!*


"Nikki" wrote:

Hi,

I have a workbook with multiple tabs. All tabs have a defined names region.
For example if a tab is named 401 there is a name in the tab for 401 =
A1:P400. I would like to change the region selection all at once so it will
change to 401= A1:Z400. I would like to use a macro to change regions for all
the tabs rather doing this manually one by one. Your help is truly appreciate
it.

Thanks in advance

Nikki
by one.