MB Builder
This extension helps you create custom fields, settings pages, and relationships with a user-friendly interface.
Creating custom fields
Custom fields are organized in groups. Each group is displayed as a collapsible panel below the post editor.
To create a field group, go to Meta Box » Custom Fields and click Add New. You'll see a screen to add fields to the group:

On the left side bar, there are three icons with corresponding panels: Add field, Structure, and Settings. Panels are resizable.
Enter the group title on the top and then click the + Add Field button and select a field type to add to the group. There are two buttons you can click to add a new field:

After that, a new field will appear in the field list. Clicking on that field on the preview to open the field settings panel where you can edit settings. Besides, to edit the label and ID of the field, you can double click on the preview to change them directly.
To find a field type quickly, type its name in the input box above the field list. The plugin will filter the fields and show only matched fields.
You can delete, duplicate or add a new field above/below the current field by clicking the icons in the field toolbar. To reorder fields, drag and drop them to the new positions.
You can see the field settings and structure at the same time by opening the floating structure panel. It’s also resizable.

When finishing adding fields, click the Settings icon and select the location where the fields are displayed for.

After that click the Save Changes button to finish.
Field settings
When adding fields to a field group, each field has its own settings. The list of settings with detailed e