Display Missing Item Options in the Matrix Tab of the Parent Matrix Item.

If users are unable to view list of Item Options in the Matrix tab of the Parent Matrix item record, perform the following:

1.    Navigate to Setup > Customization > Item Fields.

2.    Select the Item field that is missing on the Matrix tab of the Item record.

3.    Click Apply to Forms.

4.    Check if the Item field is set to be shown on the Inventory Part form. If not, mark the Show checkbox.

5.    Click Save.