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How To Collapse Or Expand All Groups In Outlook

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Information copied from:
https://www.extendoffice.com/documents/outlook/1395-outlook-collapse-expand-all-groups.html
https://www.msoutlook.info/question/595

Collapse or expand all groups by shortcut

With the following shortcut keys, you can easily collapse or expand all groups.

  1. For expanding all groups, hold on the Ctrl key and then press + sign on the number keyboard.
  2. For collapsing all groups, you can press Ctrl and sign on the number keyboard. After pressing “Ctrl –” to collapse all groups, you can see the result as following screenshot shows:
Screenshot - Keyboard shortcut

Note: You should remember, the sign “-” and “+” must on the number keyboard.

Collapse or expand single group or all groups by Collapse/Expand feature

For Outlook 2010 and 2013, if you just want to temporarily collapse or expand a single group or all groups at once in Outlook, please do as follows.

  1. If you want to collapse or expand a single group per time, you need to select this group and then click View > Expand/Collapse > Collapse This Group or Expand This Group. See screenshot:
Email - Microsoft Outlook

And only the selected single group will be collapsed or expanded.

  1. For collapsing or expanding all groups, please click View > Expand/Collapse > Collapse All Groups or Expand All Groups.
Microsoft Outlook - Email

And then all the groups in the mail listing will be collapsed or expanded.

In Outlook 2007, please click View > Expand/Collapse Groups, and then choose the options that you want to do from the expanded list.

Email - Microsoft Outlook

Collapse or expand all groups by default in Outlook

If you want to collapse or expand all groups or conversations by default in Outlook, you can change the default collapse/expand state of groups as follows:

  1. In Outlook 2007, please click View > Current View > Customize Current View. See screenshot:
Email - Microsoft Outlook

In Outlook 2010 and 2013, please click View tab, and then click View Settings in the Current View group.

Email attachment - Message
  1. In the following popping up dialog, in Outlook 2007, it is named Customize View: Messages; in Outlook 2010 and 2013, it is called Advanced View Settings: Hide Message Marked for Deletion. In that dialog, click Group By. See screenshot:
Email - Microsoft Outlook
  1. If you want to open the Outlook with all groups expanded by default, please select All Expanded in the Group By dialog under under Expand/collapse defaults. If not, select the other one.
Email - Microsoft Corporation
  1. Then click OK to close this dialog. When it returns to the previous dialog, please click OK again.
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