diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 964eab1..2c9c114 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -6224,32 +6224,38 @@
 		a non-empty String (|non-zero-arg|), then the full mode is
 		returned, otherwise only the first letter is returned.
 
-			n	Normal, Terminal-Normal
-			no	Operator-pending
-			v	Visual by character
-			V	Visual by line
-			CTRL-V	Visual blockwise
-			s	Select by character
-			S	Select by line
-			CTRL-S	Select blockwise
-			i	Insert
-			ic	Insert mode completion |compl-generic|
-			ix	Insert mode |i_CTRL-X| completion
-			R	Replace |R|
-			Rc	Replace mode completion |compl-generic|
-			Rv	Virtual Replace |gR|
-			Rx	Replace mode |i_CTRL-X| completion
-			c	Command-line editing
-			cv	Vim Ex mode |gQ|
-			ce	Normal Ex mode |Q|
-			r	Hit-enter prompt
-			rm	The -- more -- prompt
-			r?	A |:confirm| query of some sort
-			!	Shell or external command is executing
-			t	Terminal-Job mode: keys go to the job
+		   n	    Normal, Terminal-Normal
+		   no	    Operator-pending
+		   niI	    Normal using |i_CTRL-O| in |Insert-mode|
+		   niR	    Normal using |i_CTRL-O| in |Replace-mode|
+		   niV	    Normal using |i_CTRL-O| in |Virtual-Replace-mode|
+		   v	    Visual by character
+		   V	    Visual by line
+		   CTRL-V   Visual blockwise
+		   s	    Select by character
+		   S	    Select by line
+		   CTRL-S   Select blockwise
+		   i	    Insert
+		   ic	    Insert mode completion |compl-generic|
+		   ix	    Insert mode |i_CTRL-X| completion
+		   R	    Replace |R|
+		   Rc	    Replace mode completion |compl-generic|
+		   Rv	    Virtual Replace |gR|
+		   Rx	    Replace mode |i_CTRL-X| completion
+		   c	    Command-line editing
+		   cv	    Vim Ex mode |gQ|
+		   ce	    Normal Ex mode |Q|
+		   r	    Hit-enter prompt
+		   rm	    The -- more -- prompt
+		   r?	    A |:confirm| query of some sort
+		   !	    Shell or external command is executing
+		   t	    Terminal-Job mode: keys go to the job
 		This is useful in the 'statusline' option or when used
 		with |remote_expr()| In most other places it always returns
 		"c" or "n".
+		Note that in the future more modes and more specific modes may
+		be added. It's better not to compare the whole string but only
+		the leading character(s).
 		Also see |visualmode()|.
 
 mzeval({expr})							*mzeval()*