Thunderbird 52.2.0 (64 bit) suddenly started "GROUPING" threads

[lightman47]

I know this isn't CentOS - but in the last couple weeks my favorite email program advanced to ANNOYING. It has started 'grouping' threads in my INBOX. I can see the practicality of it, but I hate it! I also know they wouldn't do this without a 'setting' somewhere that would allow me to 'undo'.

Can anyone tell me what I need to change to go back (or accidentally changed to arrive "here")? Yes, given the solution, you may also advise me of my 'dopiness' if it was me.

Thank you,
jje

[TrevorH]

There's a key combination that turns that on and I know I've managed to press it at least once by accident. Go to View -> Sort and make sure it has "Unthreaded" selected near the bottom of the menu.

[lightman47]

Thank you