This is basic functionality. Watch "Basic"-videos to learn the main processes of Business Central. Basic This video includes functionality from the app "Master Data Information" which is available at Microsoft AppSource. Click to visit AppSource. Master Data Information
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Master Data are stored in a table related to the entities like customers, vendors, etc. The data is accessible through a fact box in the right-hand side of the screen, where you can select up to 10 of your favorite Master Data and you can view them when you scroll across the item list, how they change.

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Master Data Information are stored in a separate table beneath the customers, vendors, etc. and therefore we have added a fact box in the right hand side.

In this fact box, you can select up to 10 of your favorite Master Data and you can view them when you scroll across the item list, how they change.

This makes it possible for you to see Master Data Information line beneath the items, customer and vendors.

Likewise, if you look at the customers card, the same rule is there. You can see the Master Data Information fact box on the right lower side, and when I run through my customers, the Master Data will be updated.

Those fact boxes are also available on purchase orders and sales orders, so you can get information from your vendor and customers and your items when you look directly on the order.