(Last updated: 2022-05-15)
This folder has a Nextion Editor HMI file for demonstrating several ways to expand the possibilities for designing Nextion user interfaces (beyond the features that are directly supported in your device class).
A series of documents explain the various tips, tricks, and traps illustrated on the pages of the HMI file.
You can discuss this and make suggestions for improvements on the Unoffical Nextion formum post.