diff --git a/h-m-m b/h-m-m
index 1a884e6..2280c9e 100755
--- a/h-m-m
+++ b/h-m-m
@@ -2766,6 +2766,38 @@ function rank(&$mm, $add_positive, $add_negative)
 		.$mm['nodes'][ $mm['active_node'] ]['title']
 	;
 
+	push_change($mm);
+	$mm['modified'] = true;
+	build_map($mm);
+	display($mm);
+}
+
+
+// }}}
+// {{{ sort
+
+function sort_siblings(&$mm)
+{
+	if ($mm['active_node'] <= $mm['root_id'])
+		return;
+
+	$siblings = [];
+	$sibling_ids = $mm['nodes'][ $mm['nodes'][ $mm['active_node'] ]['parent'] ]['children'];
+
+	if (empty($sibling_ids))
+		return;
+
+	foreach ($sibling_ids as $sid)
+		if (mb_ereg('^\((\d+)\+,(\d+)\-\)', $mm['nodes'][$sid]['title'], $values))
+			$siblings[ (9000000 - $values[1] + $values[2]).'.'.$sid ] = $sid;
+		else
+			$siblings[ $mm['nodes'][$sid]['title'].'.'.$sid ] = $sid;
+
+	ksort($siblings, SORT_NATURAL);
+
+	$mm['nodes'][ $mm['nodes'][ $mm['active_node'] ]['parent'] ]['children'] = $siblings;
+
+	push_change($mm);
 	$mm['modified'] = true;
 	build_map($mm);
 	display($mm);
@@ -2847,6 +2879,7 @@ function monitor_key_presses(&$mm)
 			case 'S':       save($mm, true); break;
 
 			case 't':       toggle_symbol($mm); break;
+			case 'T':       sort_siblings($mm); break;
 			case '#':       toggle_numbers($mm); break;
 
 			case 'u':       undo($mm); break;
diff --git a/readme.md b/readme.md
index 4209dbe..2b6349d 100644
--- a/readme.md
+++ b/readme.md
@@ -29,19 +29,20 @@ Marks:
 
 * `t` - toggles '✓ ', '✗ ', and '' at the beginning of the title
 * `#` - adds or removes sequential numbers at the beginning of the titles of a node and its siblings
-* `=` - increase the positive ranking
-* `+` - decrease the positive ranking
-* `-` - increase the negative ranking
-* `_` - decrease the negative ranking
+* `=` - increases the positive ranking
+* `+` - decreases the positive ranking
+* `-` - increases the negative ranking
+* `_` - decreases the negative ranking
 
 Relative navigating and moving:
 
-* `h` or `←` - activate the parent of the previously active node
-* `l` or `→` - activate the middle child of the previously active node
-* `j` or `↓` - activate the lower sibling (or the nearest lower node if there's no lower sibling)
-* `k` or `↑` - activate the higher sibling (or the nearest higher node if there's no higher sibling)
+* `h` or `←` - activates the parent of the previously active node
+* `l` or `→` - activates the middle child of the previously active node
+* `j` or `↓` - activates the lower sibling (or the nearest lower node if there's no lower sibling)
+* `k` or `↑` - activates the higher sibling (or the nearest higher node if there's no higher sibling)
 * `J` - moves the current node down among its siblings
 * `K` - moves the current node up among its siblings
+* `T` - sorts the siblings of the active node
 
 Adjusting the view:
 
@@ -83,18 +84,18 @@ Save, export, and quit:
 
 In the text editor:
 
-* `↓` - move the cursor to the end of the line
-* `↑` - move the cursor to the beginning of the line
-* `←` or `Home` - move the cursor to the left
-* `→` or `End` - move the cursor to the right
-* `Ctrl+Left` or `Shift+Left` - move cursor to the previous word
-* `Ctrl+Right` or `Shift+right` - move cursor to the next word
-* `Delete` - delete character
-* `Ctrl+Delete` - delete word
-* `Backspace` - delete previous character
-* `ctrl+Backspace` - delete previous word
+* `↓` - moves the cursor to the end of the line
+* `↑` - moves the cursor to the beginning of the line
+* `←` or `Home` - moves the cursor to the left
+* `→` or `End` - moves the cursor to the right
+* `Ctrl+Left` or `Shift+Left` - moves cursor to the previous word
+* `Ctrl+Right` or `Shift+right` - moves cursor to the next word
+* `Delete` - deletes character
+* `Ctrl+Delete` - deletes word
+* `Backspace` - deletes previous character
+* `ctrl+Backspace` - deletes previous word
 * `Ctrl+v` or `Ctrl+Shift+v` - paste
-* `Esc` - cancel editing
+* `Esc` - cancels editing
 * `Enter` - wanna guess? ;)