How do I invoice a single activity?

Currently, the only way to invoice for a single activity is to manually create a part-invoice

Step-by-step guide

  1. Open the invoice details.
  2. Edit line item description to detail the activity being invoiced.

  3. Set the invoice value as appropriate for that activity.

  4. Save the invoice.

This will create a part-invoice for the desired amount, leaving the remainder to be invoiced at a later date. The part-invoice may then be issued.