Click on the Admin Panel button.
Click Library on the side menu.
Select the content you want to add pricing to from the Library.
Then click on the Pricing tab and then click on the Add pricing button.
Fill in the fields on the details and options tab.
In case you have multiple pricing, you can hide/show certain prices. To hide or show a pricing click the 3 dot icon and click Set as shown or hidden.
To enable the One-time fee access level for this content, scroll down to the access level section. Then, select the one-time fee option from the dropdown.
Click the Save button.