We refer to a “Display Only” list as one that is used to list information that may be sourced from third party systems such as accounting or services. This type of list is one that users will not interact with but will be utilized for “information only” purposes.
This type of list is different than an Embedded list because it doesn’t have any requirement for aspx forms, Sub-Grids, Action Bars or Quick Actions. Its sole purpose is to provide “read-only” information that most likely relates to an existing list.
For example, create a Read Only list for the purpose of displaying sales information for Account items.
For this type of situation, you will need to add a Read Only Sub-Grid Web part for the Account Display form.
On the Sub-Grid, configuration options select the “Use grid as read-only display” (shown below).
Below is an example of the Sub-Grid configuration where the Custom Parent Column (Account list’s Customer No) is used to match with the Custom Child Column (Sales History list’s Customer #).
When viewing one Account Display form with the above configuration the user will see only the Sales History for that Account.
As long as the Custom Parent and Custom Child Column configurations are working Read Only custom list data will be filtered correctly.