If you want to create a new customer contract or make changes to an existing customer contract, you can click the “New” or “Edit” button in the top right. This opens the following menu:

Fill in the fields and finish with “Save”.
Subscription:
Pre-filled with the current subscription.
Customer:
Can only be selected when creating a new customer contract. Here you select the customer the subscription should be assigned to.
Discount amount:
Fill this in if a specific discount amount should be given to this customer on each charge.
Discount %:
Fill this in if a specific discount percentage should be given to this customer on each charge.
Start date:
The start date on which this subscription should take effect for the customer.
Serial number item:
This subscription can be linked to one of the customer's serial number items.
As a result, the sales order for this serial number item will show the linked subscription. See also pre-code above.
Want to know more?
Read more in these related articles:
Customer subscriptions
How to create, edit and run customer subscriptions in Financial. The article covers the list, the editing dialog, the history popup and the batch-run dialog.
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This article walks through how to access and create or edit subscriptions in Sapera
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Create and manage subscription templates in Sapera. Define the period, invoicing method, item lines and settings used by customer subscription contracts during automatic invoicing.