Hi,
You can see all the G/L posting listed via the G/L register page. Basically for every financial transaction you post, be it an invoice, payment, cash, or journal etc a G/L register is created that groups all the associated entries i.e.

You can then highlight a G/L register and click "Process > General Ledger" to see the GL entries associated with the G/L register. If this was G/L register originating from a Sales Invoice you can click "Process > Customer Ledger" to see the customer ledger entries as well.
Hope this helps
Thanks
Gavin