Can I add an hour specification to an hourly invoice (old Sales)?

Disclaimer

All screenshots in the article were taken in the Dutch version of Yuki.

The hour specification can be added to an invoice created from an invoice layout in the Sales functionality.

Hover your mouse over the Settings icon on the navigation bar and then click on Sales settings in the now-opened screen. Scroll to Invoice layouts and click > in front of for the appropriate invoice layout.

In the now-opened screen, click on the pencil icon and then under the Specification settings heading, select the option Include hour specification when invoicing activities.

Then click on the Save button.