Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?

[Phil Sainty]

On 2022-01-19 17:47, Po Lu wrote:
> I think the "zero width characters" alluded to are displayed
> by Emacs as 1 pixel wide spaces

You can highlight them like so:

(set-face-background 'glyphless-char "red")

I've had that configured ever since
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=31194#40

If you're not expecting zero-width characters in text in general,
I think it's a good setting.


-Phil