For speech rate in settings up/down move by 10, left/right move by 1. Easier to get settings right without having to hold doown the arrow keys lol.

docs/fenrir.1

@@ -239,6 +239,7 @@ Activate \f[B]OK\f[R] to save, or \f[B]Cancel\f[R] or Escape to discard
 the form\(cqs changes.
 .PP
 Speech rate, pitch, and volume use a scale from \-100 to 100.
+For speech rate, Up and Down change the value by 10; Left and Right change it by 1.
 Sound volume is between 0.0 and 1.0.
 Backend, device, keyboard layout, sound theme, and other launch\-only
 settings take effect on the next start.