The 'split message to new ticket' feature is handy. However, sometimes there is a message you want to create a new ticket from without removing it from the existing ticket. It frequently happens that a customer responds with something like 'Here's more information about the problem....and oh, by the way...here's another completely unrelated question' it would be nice to be able to copy, rather than split, these to a new ticket without removing the message from the original.
Add a "copy message to new ticket" to ticket "Actions" - Community / Feature Request - Deskpro Support
Add a "copy message to new ticket" to ticket "Actions" Collecting Feedback
Is « create a linked ticket » the corresponding feature?
Perhaps these 2 suggestions could be merged?