How to bulk delete "Conversations"?

[Edwin]

Is there a way to bulk delete "Conversations" i.e. what used to be known as PMs?

I want to delete most but not all of mine, and was looking for a function that would let me delete them one screenful at a time. Maybe I'm just looking in the wrong place.

Thanks in advance!

 

[Murray]

Click on a conversation, a pop up with appear, click select all

 

[Edwin]

Click on a conversation, a pop up with appear, click select all
View attachment 2939

Thanks, that's half the puzzle!

I also need (if possible) a way of selecting conversations in bulk. I've 2500 to go through.