Welcome to the Method forums!
The HTML Editor which is similar to the text input controller, but contains a lot more options to modify the text, embed media, and also formats HTML.
In your scenerio a total of 3 controllers on screen:
- HTML Editor
- Submit button
- Text Input
The HTML Editor is where they will have access to enter their data into.
The Submit button will then take this data from the HTML Editor and update the Text Input with.
Set the Text Input load state as disabled so no one is able to modify the text.
To push the HTML Editor data into the Text Input, within Submit button click event, use the Update Controls On Screen action. Updating the Text Input control with the data from the HTML Editor.
Hope that makes sense! If not let me know and I can further break down the steps.
-- Morty