diff --git a/CMakeLists.txt b/CMakeLists.txt
index 43d7a47..ea5657e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.15)
 project(ke C)  # Specify C language explicitly
 
 set(CMAKE_C_STANDARD 99)
-set(KE_VERSION "1.5.6")
+set(KE_VERSION "2.0.0")
 
 set(CMAKE_C_FLAGS "-Wall -Wextra -pedantic -Wshadow -Werror -std=c99 -g")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_DEFAULT_SOURCE -D_XOPEN_SOURCE")
diff --git a/buffer.c b/buffer.c
index ae39e3c..cb1070f 100644
--- a/buffer.c
+++ b/buffer.c
@@ -418,6 +418,7 @@ buffer_close_current(void)
 	int	 target  = 0;
 	int	 nb      = 0;
 
+	/* sanity check */
 	if (editor.curbuf < 0 || editor.curbuf >= editor.bufcount) {
 		editor_set_status("No buffer to close.");
 		return;
diff --git a/buffer.h b/buffer.h
index e760f6d..970392b 100644
--- a/buffer.h
+++ b/buffer.h
@@ -43,7 +43,6 @@ void		 buffer_prev(void);
 void		 buffer_switch_by_name(void);
 void		 buffer_close_current(void);
 const char	*buffer_name(buffer *b);
-/* Helpers */
 int		 buffer_is_unnamed_and_empty(const buffer *b);
 
 
diff --git a/ke.1 b/ke.1
index 0e2267f..38774ac 100644
--- a/ke.1
+++ b/ke.1
@@ -32,8 +32,11 @@ Toggle the mark.
 If the mark is set, unindent the region.
 .It C-k =
 If the mark is set, indent the region.
+.It C-k b
+Switch to a buffer.
 .It C-k c
-Clear (flush) the kill ring.
+Close the current buffer. If no other buffers are open, an empty
+buffer will be opened. To exit, use C-k q.
 .It C-k d
 Delete from the cursor to the end of the line.
 .It C-k C-d
@@ -41,7 +44,7 @@ Delete the entire line.
 .It C-k e
 Edit a new file. Also C-k C-e.
 .It C-k f
-Incremental find.
+Flush the kill ring.
 .It C-k g
 Go to a specific line.
 .It C-k j
@@ -50,6 +53,8 @@ Jump to the mark.
 List the number of lines of code in a saved file.
 .It C-k m
 Run make(1).
+.It C-k p
+Switch to the next buffer.
 .It C-k q
 Exit the editor. If the file has unsaved changes,
 a warning will be printed; a second C-k q will exit.
@@ -60,9 +65,9 @@ Reload the current buffer from disk.
 .It C-k s
 Save the file, prompting for a filename if needed. Also C-k C-s.
 .It C-k u
-Undo changes.
+Undo changes (not implemented; marking this k-command as taken).
 .It C-k U
-Redo changes.
+Redo changes (not implemented; marking this k-command as taken).
 .It C-k x
 save the file and exit. Also C-k C-x.
 .It C-k y