In NAV 2017, there is a Template feature, for example in Item card.
We can setup the Template, with the default value we want to fill the master card with. For example: for Retail items, the Gen. Prod. Posting Group is RETAIL, while for Manufactured items, must be MANUFACT.
Then, each time we create a new item card, we can fill those fields with the default values, based on the template card. Saves time, and reduce human error as well.
But, the fields are limited. Luckily, we can extend the functionality by adding the new fields we need.