In order not to overwhelm new Akti users with information during the creation of documents, some more advanced functions are "hidden" under the settings of documents. In these settings you'll find the option to apply line discounts (variable percentages per line on the document) or global discounts (discount on the final total of the document).
To access these options, click on the grey bar of the settings at the top of the screen.
You can only click this grey bar after selecting a customer account.
Then, in the menu that opens up, you can add discounts by activating the sliders.
If you want to apply a line discount to a document that already contains lines, it is recommended to click on "Apply discount on all lines" after entering the percentage.