On my invoices, I included the "Slip Date" field. Now, I need to enter some work items that were missed earlier, and I don't see how to change the slip dates. It only gives the date the slip was created (today), and I don't see any way to adjust it.

Is there any way to set it or should I be using one of the other fields (like date started or completed) on my invoices?

Also, for some clients I issue a monthly invoice, so it would be helpful to see the date column in the list of working slips, in order to select them. Currently I have to select all slips, then preview the invoice, then go back and remove slips that were outside the date range.