Put this one-liner in the workbook's _Open() event handler:

Worksheets(1).Activate

To get the right click on the Excel icon immediately to the left of the
"File" menu option in the Excel window and choose [View Code] from the list.
Copy the code below and paste it into the code module presented to you:

Private Sub Workbook_Open()
ThisWorkbook.Worksheets(1).Activate
End Sub

That's a macro, so you're going to have to enable macros when you open the
workbook for it to happen. You may need to set your macro security to allow
it to run. I recommend a Macro Security (Tools | Macro | Security) setting
of Medium vs Low. You'll get a 'nag' when you open the workbook, but I'd
rather put up with that than to have someone send me a workbook with
malicious code and allow it to run without alerting me. Once you change the
security level setting you have to close Excel and then reopen for the new
setting to take effect.

"ExtraLarge XL User" wrote:

I have a multiple sheet Excel workbook that I reference often, but it opens
to a middle sheet, not to the first sheet like I want. Any ideas?