How to auto populate the comments again in worknotes?

[Shaik Gouse Mas]

How to auto populate the comments again in worknotes?

[Elijah Aromola]

Are you trying to copy additional comments into work notes? 

You can create a before business rule on insert/update when 'Additional comments' changes. Then add the following script.

current.work_notes = current.comments.getJournalEntry(1)