This tutorial uses such a case of the tour agency as a sample of multi-related data. The data scheme implements the one-to-many relation 一 the tour agency proposes many tours across one country.
JetEngine allows to control the related items both from the parent and child pages. Here we consider the editing of child posts from the parent page.

Tutorial requirements:
- the JetEngine plugin installed and activated;
- Elementor free version or Block Editor;
- configured relations between two custom post types.
Controls to Edit Relations
Controls aim to make editing of relations convenient using the WordPress dashboard and to specify user roles to get or not access to editing. You need to enter the Relation tab of JetEngine and open current relation and check the following options:

Parent Post Controls
Enable the Register controls for parent object and Allow to create new children from parent toggles in the relation editor.
Read more about How to Create Relationships Between Posts in this tutorial.
Open a post from the Country CPT to add a new related item. Then scroll down the post editing area to the Children Tour section and press the “Connect Tour” button to add a new post from the drop-down list.

The new child post will be added to the parent post. The connected items are displayed in the Children Tour section.

If the relation includes at least one meta field, you will see the corresponding meta field settings after clicking the button.
Fill in the field or leave it empty and push the “Save Meta Data” button.
Columns for Editing
Title
This column displays the name of the related posts.
Title structure will change depending on the related object type. The standard title is used for posts and terms, the login and email are displayed when users are chosen, and if the custom relation type is selected, your input will be used as a title.

Meta Data
This column appears only if some meta fields are added to the related post object.

A new pop-up with the meta fields editor appears when the “Edit Meta” button is pushed.
Complete the needed fields and press the “Save Meta Data” button.

Actions
This column includes several buttons to edit, view, and disconnect the posts.

The “View” button allows viewing the chosen item on the front end in the new tab.
The “View” button allows viewing the chosen item on the front end in the new tab.
The “Disconnect” button removes the item from the list of related posts.
Children Post Controls
Enable the Register controls for child object and Allow to create new parents from children toggles in the relation editor.
The same table is available in the child object posts. There, you can connect and add new parent items, edit, view, and delete items, too.
Let’s consider the “Edit” button because the meaning of the “View” and “Disconnect” buttons are apparent and do not have special features.

This is it. Now you know how to use the main functionality of the JetEngine related items editing on your WordPress website.