Purge (delete) messages from chat in-bulk.
The easiest way to use Lindsey's pruning feature is to right click on the target message!
Then go to
Actions > Delete until here, this will delete all messages in the chat until it reaches the message you clicked on (inclusive).
To delete 10 recent messages, simply go to the desired channel and type:
/prune count: 10
To delete messages from a specific user, simply type:
/prune count: 2 user: User