the Editor support large graph,such as 1024*2000px. but the screen just display the resolution of Nextion (which you select).
If I misunderstand you, please provide your HMI file.
OK. We will try....
The waveform in its current for is still limited to 0 to 255.
The maximum usable size is 255px. The HMI design needs to account for this limitation.
A waveform can still be 400px high only data will reach 255 height.
This topic deemed historic and will be marked as solved.