Correspondent, Subject, Date 

                                           Correspondent,             > Subject            Date

                                                      Correspondent, Subject, Date  in chrono order without the treeing or layering.

Dear All: I have been using Mozilla Thunderbird for nigh on 20 years now and have always used the the DEFAULT INBOX MSF file listing as shown in the attached screenshot entitled " MSF Normal Legacy Format", namely Correspondent, Subject, Date with all entries sorted in chronological order and new emails entries in bold. I encountered my first ever "Building Summary file for Inbox" in 20 years. All the inbox emails were rebuild BUT the format of the rebuild is completely different now with an extremely annoying format of: Correspondent, > Subject Date where the > symbol launches a tree or layered listing of previously dated inbox emails linked by the subject title as shown in the attached screenshot "MSF File Rebuild Tree or Layered Format" THIS IS EXTREMELY IRRITATING AS IT CORRUPTS THE TRUE CHRONOLOGICAL LISTING. Could you please advise how I can change the format of the MSF file shown in the "MSF Normal Legacy Format" where emails are just as: Correspondent, Subject, Date in chrono order without the treeing or layering. My version of Mozilla Thunderbird is 115.13.0 (64 Bit) running on Windows 7 Professional Thanks.