1. First, click on "Settings."

2. After, click on "Custom Fields".

3. After, click on "Add Field".

4. After that, click on "Text Box List".

5. Review the preview section.

6. Click "Next" to proceed.

7. Enter a name in the "Field Name" section.

8. Use the drop-down menu to select a "Group."

9. Enter label name.

10. Then, enter placeholder.

11. Next up, click on "Add an option".

12. Next, you can remove the label just clicking the delete icon next to it.

13. Another drop-down menu will appear for object selection.

14. Click on "Additional Preferences" for further customization.

15. If you require a unique key, click to customize it.

16. Add description of the field.

17. Finally, click on "Save".
