To reverse a batch first of all you will need to go to Nominal Ledger Enquiry. Now view the View By Batch from the view drop down to list all the batches. Select the batch you wish to reverse and click on the reverse button. You will be prompted with a warning before the batch is reversed.
Note. You can not reverse investment batches from this screen, they have to be reversed via enPortfolio.
When you reverse a batch the system assumes you are doing it for the purpose of editing the details and will place the batch in it's unposted state back in the Journal Browser for Journal's and Cash Book Browser for Cash Book entries. If you need to completely delete the batch you do so from these screens.