Hi Renee. Did you actually do that exercise? I think if you do the exercise, the difference will be obvious. That exercise shows how using the SUBTOTAL function prepares the data, so the Auto Outline will create collapsible groups based on the subtotals. If you only used Auto Sum, the Auto Outline wouldn't recognize the subtotals. As I said in the book, personally I prefer the Subtotal command over the SUBTOTAL function ... but I only show you that in case you get a workbook where the SUBTOTAL function has already been used on the data and now you want to create the collapsible groups like the Subtotal command does. If you look at the cells in that spreadsheet, you will see that the ones totaled with AutoSum do not create collapsible groups like the ones that were summed using the SUBTOTAL function do. Personally, the subtotal command is much easier to deal with than the SUBTOTAL function and auto outlining, I think. Hope that explains it. Good luck on your certification! ******************************* Linda F. Johnson Linda's Computer Stop http://personal-computer-tutor.com -----Original Message----- From: mso-bounce@xxxxxxxxxxxxx [mailto:mso-bounce@xxxxxxxxxxxxx] On Behalf Of Renee Hughes Sent: Monday, July 09, 2007 8:40 AM To: mso@xxxxxxxxxxxxx Subject: [mso] Excel Subtotals I'm studying Linda's book in preparation for MOS Expert certification in Excel. In Chapter 7 I'm going over the subtotal function and I can't seem to see the advantage of using the subtotal function over using Auto Sum, they seem to do the same thing. ************************************************************* You are receiving this mail because you subscribed to mso@xxxxxxxxxxxxx or MicrosoftOffice@xxxxxxxxxxxxxxxx To send mail to the group, simply address it to mso@xxxxxxxxxxxxx To Unsubscribe from this group, visit the group's homepage and use the dropdown menu at the top. This will allow you to unsubscribe your email address or change your email settings to digest or vacation (no mail). //www.freelists.org/webpage/mso To be able to share files with the group, you must join our Yahoo sister group. This group will not allow for posting of emails, but will allow you to join and share problem files, templates, etc.: http://tech.groups.yahoo.com/group/MicrosoftOffice . This group is for FILE SHARING ONLY. If you are using Outlook and you see a lot of unnecessary code in your email messages, read these instructions that explain why and how to fix it: http://personal-computer-tutor.com/abc3/v28/greg28.htm ************************************************************* ************************************************************* You are receiving this mail because you subscribed to mso@xxxxxxxxxxxxx or MicrosoftOffice@xxxxxxxxxxxxxxxx To send mail to the group, simply address it to mso@xxxxxxxxxxxxx To Unsubscribe from this group, visit the group's homepage and use the dropdown menu at the top. This will allow you to unsubscribe your email address or change your email settings to digest or vacation (no mail). //www.freelists.org/webpage/mso To be able to share files with the group, you must join our Yahoo sister group. This group will not allow for posting of emails, but will allow you to join and share problem files, templates, etc.: http://tech.groups.yahoo.com/group/MicrosoftOffice . This group is for FILE SHARING ONLY. If you are using Outlook and you see a lot of unnecessary code in your email messages, read these instructions that explain why and how to fix it: http://personal-computer-tutor.com/abc3/v28/greg28.htm *************************************************************