In Master data information setup- under replicate data setup.
Select a field on a table. it is supported on the tables shown in this list.
Choose the Information code, and the Master data field type, for what you want to see on the page. Repeat for each MDI field.
When this is set up, you can see the fields on the item list, and the item card.
If you have already filled out MDI in Master data information page, you can update the fields on the card by running Update card pages, on the replicate Master data on page. It is only relevant the first time.
When the two fields are synchronized, they will synchronize the update forward. So if you change a value on the Item card, it will update in the Master data table and like wise the other way around.