Is it possible to edit a file in whiptail? For a new TUI, I want to employ whiptail or dialog to make it a bit more visually appealing. Afaik, whiptail is more widely available and even preinstalled on many systems, which is a good reason to use it. (Is that still true?) But a nice-to-have feature would be to be able to seamlessly edit files in the TUI. In dialog, there is the option `--editbox`. **Is there something similar for whiptail?** I couldn't find it in the man pages, but it would not be the first time, that I am just not seeing something O_o .

Whiptail doesn't do that. It's designed to imitate an old version of dialog. The underlying library (newt) is used by python scripts to implement some more involved user interfaces, but aside from reading the source code (and a _**very**_ old tutorial), there's no documentation.