Time windows are created on individual orders, via an API import, or a part of an order spreadsheet import, alternatively the user can do a global change for all pickup and delivery order in the system settings. From the settings the user can select a standard time window for all Pickup and Delivery orders.
How to change time windows after created/imported orders
1. Go to Orders:
2. Search orders / editing the filter to find orders you want
3. Click into the order you want to edit
4. Edit time windows. The Service Time is how long a driver/vehicle would stay onsite at a customer location on average per order.
Global Change for all pickup and delivery order in the system settings
1. Go to Setting:
2. Click "Orders" tab and select "Use System Times"

Use system (or client) default times for pickup and delivery, when importing orders.