diff --git a/runtime/doc/index.txt b/runtime/doc/index.txt
index 00a09ae..d03d81e 100644
--- a/runtime/doc/index.txt
+++ b/runtime/doc/index.txt
@@ -1,4 +1,4 @@
-*index.txt*     For Vim version 9.1.  Last change: 2025 May 14
+*index.txt*     For Vim version 9.1.  Last change: 2025 May 26
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -163,6 +163,7 @@
 |i_CTRL-X_CTRL-N|	CTRL-X CTRL-N	next completion
 |i_CTRL-X_CTRL-O|	CTRL-X CTRL-O	omni completion
 |i_CTRL-X_CTRL-P|	CTRL-X CTRL-P	previous completion
+|i_CTRL-X_CTRL-R|	CTRL-X CTRL-R	complete words from registers
 |i_CTRL-X_CTRL-S|	CTRL-X CTRL-S	spelling suggestions
 |i_CTRL-X_CTRL-T|	CTRL-X CTRL-T	complete identifiers from thesaurus
 |i_CTRL-X_CTRL-Y|	CTRL-X CTRL-Y	scroll down
diff --git a/runtime/doc/insert.txt b/runtime/doc/insert.txt
index f3d92b2..553183d 100644
--- a/runtime/doc/insert.txt
+++ b/runtime/doc/insert.txt
@@ -1,4 +1,4 @@
-*insert.txt*    For Vim version 9.1.  Last change: 2025 May 08
+*insert.txt*    For Vim version 9.1.  Last change: 2025 May 26
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -649,6 +649,7 @@
 11. omni completion					|i_CTRL-X_CTRL-O|
 12. Spelling suggestions				|i_CTRL-X_s|
 13. keywords in 'complete'				|i_CTRL-N| |i_CTRL-P|
+14. words from registers				|i_CTRL-X_CTRL-R|
 
 Additionally, |i_CTRL-X_CTRL-Z| stops completion without changing the text.
 
@@ -1019,6 +1020,21 @@
 			completion, for example: >
 				:imap <Tab> <C-X><C-V>
 
+
+Completing words from registers				*compl-register-words*
+							*i_CTRL-X_CTRL-R*
+CTRL-X CTRL-R		Guess what kind of item is in front of the cursor from
+			all registers and find the first match for it.
+			Further use of CTRL-R (without CTRL-X) will insert the
+			register content, see |i_CTRL-R|.
+			'ignorecase' applies to the matching.
+
+	CTRL-N		Search forwards for next match.  This match replaces
+			the previous one.
+
+	CTRL-P		Search backwards for previous match.  This match
+			replaces the previous one.
+
 User defined completion					*compl-function*
 
 Completion is done by a function that can be defined by the user with the
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index e74c5e8..f0a7e9e 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt*	For Vim version 9.1.  Last change: 2025 May 16
+*options.txt*	For Vim version 9.1.  Last change: 2025 May 26
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -4658,7 +4658,8 @@
 'ignorecase' 'ic'	boolean	(default off)
 			global
 	Ignore case in search patterns, |cmdline-completion|, when
-	searching in the tags file, and non-|Vim9| |expr-==|.
+	searching in the tags file, non-|Vim9| |expr-==| and for Insert-mode
+	completion |ins-completion|.
 	Also see 'smartcase' and 'tagcase'.
 	Can be overruled by using "\c" or "\C" in the pattern, see
 	|/ignorecase|.
diff --git a/runtime/doc/tags b/runtime/doc/tags
index e586212..d3c77d1 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -6654,6 +6654,7 @@
 compl-keyword	insert.txt	/*compl-keyword*
 compl-omni	insert.txt	/*compl-omni*
 compl-omni-filetypes	insert.txt	/*compl-omni-filetypes*
+compl-register-words	insert.txt	/*compl-register-words*
 compl-spelling	insert.txt	/*compl-spelling*
 compl-states	insert.txt	/*compl-states*
 compl-stop	insert.txt	/*compl-stop*
@@ -8425,6 +8426,7 @@
 i_CTRL-X_CTRL-N	insert.txt	/*i_CTRL-X_CTRL-N*
 i_CTRL-X_CTRL-O	insert.txt	/*i_CTRL-X_CTRL-O*
 i_CTRL-X_CTRL-P	insert.txt	/*i_CTRL-X_CTRL-P*
+i_CTRL-X_CTRL-R	insert.txt	/*i_CTRL-X_CTRL-R*
 i_CTRL-X_CTRL-S	insert.txt	/*i_CTRL-X_CTRL-S*
 i_CTRL-X_CTRL-T	insert.txt	/*i_CTRL-X_CTRL-T*
 i_CTRL-X_CTRL-U	insert.txt	/*i_CTRL-X_CTRL-U*
diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index 5223687..578f5e8 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -1,4 +1,4 @@
-*todo.txt*      For Vim version 9.1.  Last change: 2025 Apr 24
+*todo.txt*      For Vim version 9.1.  Last change: 2025 May 26
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -4764,7 +4764,6 @@
 7   When expanding $HOME/dir with ^X^F keep the $HOME (with an option?).
 7   Add CTRL-X command in Insert mode like CTRL-X CTRL-N, that completes WORDS
     instead of words.
-8   Add CTRL-X CTRL-R: complete words from register contents.
 8   Add completion of previously inserted texts (like what CTRL-A does).
     Requires remembering a number of insertions.
 8   Add 'f' flag to 'complete': Expand file names.
diff --git a/runtime/doc/usr_24.txt b/runtime/doc/usr_24.txt
index 72f43f0..250bd17 100644
--- a/runtime/doc/usr_24.txt
+++ b/runtime/doc/usr_24.txt
@@ -187,6 +187,7 @@
 	CTRL-X CTRL-D		macro definitions (also in included files)
 	CTRL-X CTRL-I		current and included files
 	CTRL-X CTRL-K		words from a dictionary
+	CTRL-X CTRL-R		words from registers
 	CTRL-X CTRL-T		words from a thesaurus
 	CTRL-X CTRL-]		tags
 	CTRL-X CTRL-V		Vim command line
diff --git a/runtime/doc/version9.txt b/runtime/doc/version9.txt
index e03deed..662cb17 100644
--- a/runtime/doc/version9.txt
+++ b/runtime/doc/version9.txt
@@ -1,4 +1,4 @@
-*version9.txt*  For Vim version 9.1.  Last change: 2025 May 16
+*version9.txt*  For Vim version 9.1.  Last change: 2025 May 26
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -41586,6 +41586,9 @@
 
 Support for a vertical |tabpanel| window similar to the 'tabline'.
 
+New Insert-mode completion: |i_CTRL-X_CTRL-R| to complete words from
+registers.
+
 							*changed-9.2*
 Changed~
 -------
diff --git a/runtime/doc/vi_diff.txt b/runtime/doc/vi_diff.txt
index 46db57a..ae14968 100644
--- a/runtime/doc/vi_diff.txt
+++ b/runtime/doc/vi_diff.txt
@@ -338,6 +338,7 @@
 	|i_CTRL-X_CTRL-D|	definitions or macros
 	|i_CTRL-X_CTRL-O|	Omni completion: clever completion
 				specifically for a file type
+	|i_CTRL-X_CTRL-R|	words from registers
 	etc.
 
 Long line support.					|'wrap'| |'linebreak'|