Rental price lists are defined by going to Items → Price Lists.

Then click Add to add a new price list. Define the name, currency, and price list type.
Add the item you are interested in by clicking Add.
After selecting the product or an entire group of items, choose how the net price should be defined. You can enter a fixed amount (Sum), set a percentage of the base price (Percentage), or apply a discount (Discount). This flexibility allows you to quickly create consistent price rules for multiple products. For example, in rental mode, this could be a price per hour or per day of rental. Then save by clicking
.
To assign a customer, click on +. Than select the customer. Save by clicking select.
Price lists allow you to easily set prices for retail/wholesale rentals. To verify this, go to edit the product in the search field.
When creating a new rental without assigning a specific customer, you can freely choose the applicable price list from the available options.
If the document includes a customer who already has a predefined price list assigned, that price list will be selected automatically.