How Do I Invoice Unbilled Activities?

You can invoice unbilled any of your time entries and expenses in the Accounting section.

In the Invoice page, click the + button on the green bar and select "Invoice Unbilled Activities".
This will bring you to a page that shows all unbilled time and expenses grouped by Matter. Here you can check off the items you'd like to bill.
Once you've selected the correct entries, click Generate Invoice at the bottom of the page to create a new Invoice. The newly created invoice will show at the top of your invoice list where you can apply payments, add new line items and print out the invoice.

If you'd like to learn more about what you can do with time entries, take a look at this Time Entry Overview video.