If you install uiflow firmware you have also installed micropython. You can connect to a repl shell, load libraries, and modify main.py. You can use any micropython ide and you aren't required to use uiflow. It is a good option though. I like using upycraft. Even if I am running uiflow I'll still keep a connection to the board open with upycraft to get immediate feedback. With upycraft you have direct access to the filesystem and you can drag and drop files to and from the board. You can also run
where module is one of the listed modules. To learn more of all the built in functions available.
Now i am a copy and paste my own code .... coder....
Copied my slider and made a mechanism that selects and sets each slider.
Next and previous makes you jump between each slider, left and right sets the value , ok publishes the value and up gets you back to the main menu.
I still have issues to get my values in to m5ez object like the header, text works fine but int is still a issue. Tried to convert them to chars, but failed....
So much to learn at once.