It would be nice if additional fields defined for debits and credits in /admin/additional-fields.pl could be displayed in transaction table and made searchable.
What do you mean by 'Transaction table' here, Mathieu.. Do you mean on the point of sale picker?
No, we don't use this feature in my library, too complex. If you don't use point of sales and you make credits and débits from the account of a patron you have a page with 4 tabs. One of them is labelled transactions I believe