To do batch billing in ArchiOffice/EngineerOffice:
1. Open the Billing > Projects screen.
2. Select 'Project with Unbilled Slips' option. Apply other filters if necessary to refine the list.
3. You may review the time entries by clicking the List icon. For now, check the All box against the projects you want to bill.
4. Click the Generate Invoices button at the bottom to bill all the selected projects. The invoice records disappear from this tab and show up on the Drafts tab.
5. Select the checkboxes for all invoices you want to finalize.
6. Click the Finalize button at the bottom. The invoice records disappear from this tab and now show up on the Outstanding tab. 
Else, to delete the draft, click the Delete icon on the Drafts grid.
