diff --git a/man4/console_codes.4 b/man4/console_codes.4
index 82a71d28b..33eb6b53c 100644
--- a/man4/console_codes.4
+++ b/man4/console_codes.4
@@ -259,7 +259,8 @@ causes the high bit of a byte to be toggled
 before the mapping table translation is done.
 T}
 21	T{
-set underline (<4.17 and many other terminals set normal intensity)
+set underline; before Linux 4.17, this value
+set normal intensity (as is done in many other terminals)
 T}
 22	set normal intensity
 24	underline off
@@ -275,8 +276,12 @@ T}
 37	set white foreground
 38	T{
 256/24-bit foreground color follows, shoehorned into 16 basic colors
+(before Linux 3.16: set underscore on, set default foreground color)
+T}
+39	T{
+set default foreground color
+(before Linux 3.16: set underscore off, set default foreground color)
 T}
-39	set default foreground color
 40	set black background
 41	set red background
 42	set green background
@@ -300,7 +305,7 @@ l l.
 256 color: values 0..15 are IBGR (black, red, green, ... white),
 16..231 a 6x6x6 color cube, 232..255 a grayscale ramp
 T}
-;2;r;g;b	24-bit color, components go 0..255
+;2;r;g;b	24-bit color, r/g/b components are in the range 0..255
 .TE
 .PP
 .B ECMA-48 Mode Switches