http://purl.org/tcl/home/man/tcl8.4/TkCmd/console.htm

It is my understanding that, for some strange reason, Tk does not yet
support console on Unix.  That seems very anti-Tk to me - why waste so
much time being cross platform and then break it by not offering something so simple?

[RS] I think it was the other way round: on Unixes, where Tcl originated, you'd start wish ''at'' a console and be able to use its stdin/out/err from inside Tcl. Windows apps typically don't have these channels, so the [Windows wish console] was added to compensate for the loss. That WinTk's console grew more powerful (e.g. you can interact with the interpreter while a script is running, which you can't by default on Unix) justifies your wish to re-implant the original "bugfix" into generic Tk - or pull [tkcon] into the core?

----
Certainly I can see having at least the minimal console everywhere -I would
also be heartily in favor of tkcon or something better being the default
console across platforms.

Of course, in both cases, a [TIP] is going to be needed...
----
See [console for Unix].
----
[RS] uses the following binding to have a console for debugging pop up when needed:
 bind . ? {catch {console show}}
----
[Tk syntax help] - [Arts and crafts of Tcl-Tk programming]
- [Category Command], a part of the [Tk] package