man/man4/console_codes.4: Mention caveats for xterm(1)'s ESC ] 50 command

Fonts are only settable if xterm(1) was launched with the right options
(or X11 resources) that would allow this operation.

Signed-off-by: Jan Engelhardt <jengelh@inai.de>
Message-ID: <20260710221035.26529-1-jengelh@inai.de>
[alx: wfix]
Signed-off-by: Alejandro Colomar <alx@kernel.org>

diff --git a/man/man4/console_codes.4 b/man/man4/console_codes.4
index 2fa8368e1af987de41ad1ed2b691c197c0e12e10..10d2e3b5fd527db647e75e681318e71d2551282f 100644 (file)
--- a/man/man4/console_codes.4
+++ b/man/man4/console_codes.4
@@ -760,7 +760,12 @@ Change log file to
 .I name
 (normally disabled by a compile-time option).
 T}
-ESC ] 50 ; \f[I]fn\f[] ST      Set font to \f[I]fn\f[].
+ESC ] 50 ; \f[I]fn\f[] ST      T{
+Set font to \f[I]fn\f[]
+(the escape code is normally disabled;
+see "allowFontOps" in
+.BR xterm (1)).
+T}
 .TE
 .P
 It recognizes the following with slightly modified meaning