On Tue, Aug 24, 2021 at 06:05:46PM -0400, Stefan Monnier wrote:
> > I think that definitively "\e[29~" may be bound to [menu] in
> > xterm. Somehow confirmed by the xterm maintainer in an email:
> >
> > "in a quick check the key which I guessed is "menu" (between the Windows
> > key and the Ctrl key on the right-side of my keyboard) does send ^[[29~
> > and xev says that's "Menu""
> 
> I'm sorry but I don't understand this.  Maybe I'm just missing some of
> the context in your email exchange, but the way it's written above gives
> the impression that something external to xterm decides which byte
> sequence to send when the `menu` or `print` key are used, whereas this
> decision is made by xterm (partly influenced by things like
> X resource settings).

The latter was my point: it's exactly xterm (or whatever X terminal
application you are using) which (possibly) converts X events to
escape sequences.

In the case of xterm this can be configured via X resources.

> FWIW, in my environment, I have a key labeled `PrtSc` which `xev` says
> sends a `Print` event to X11, which `emacs` says sends a `print` event,
> and which `emacs --nw` running inside `xterm` doesn't receive at all
> (i.e. my `xterm` doesn't send any bytes in response to it).

Yes, that corresponds to my findings. I guess the "Print" key was not
a thing whenever the X resources for xterm were set up and nobody has
bothered to change them in the mean time.

Cheers
 - t