diff --git a/README.asciidoc b/README.asciidoc
index f45de173..3a2a381f 100644
--- a/README.asciidoc
+++ b/README.asciidoc
@@ -137,9 +137,15 @@ select the paragraph with enough _x_. press _s_ and enter roger then enter.
 now paragraph selection was replaced with multiselection of each roger in
 the paragraph. press _c_ and marcel<esc> to replace rogers with marcels.
 
-A multiselection can also be obtained with _Alt-s_, which splits the current
+A multiselection can also be obtained with _S_, which splits the current
 selection according to the regex entered. To split a comma separated list,
-use _alt-s_ then ', *'
+use _S_ then ', *'
+
+_s_ and _S_ share the search pattern with _/_, and hence entering an empty
+pattern uses the last one.
+
+As a convenience, _alt-s_ allows you to split the current selections on
+line boundaries.
 
 To clear multiple selections, use _space_. To keep only the nth selection
 use _n_ followed by _space_, to remove only the nth selection, use _n_
diff --git a/src/main.cc b/src/main.cc
index 4a4a6bb8..12f33e45 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -300,6 +300,11 @@ void do_split_regex(Context& context)
         });
 }
 
+void do_split_lines(Context& context)
+{
+    context.editor().multi_select(std::bind(split_selection, _1, "^"));
+}
+
 void do_join(Context& context)
 {
     Editor& editor = context.editor();
@@ -588,6 +593,8 @@ std::unordered_map<Key, std::function<void (Context& context)>> keymap =
     { { Key::Modifiers::Alt,  'p' }, do_paste<InsertMode::Replace> },
 
     { { Key::Modifiers::None, 's' }, do_select_regex },
+    { { Key::Modifiers::None, 'S' }, do_split_regex },
+    { { Key::Modifiers::Alt,  's' }, do_split_lines },
 
     { { Key::Modifiers::None, '.' }, do_repeat_insert },
 
@@ -641,8 +648,6 @@ std::unordered_map<Key, std::function<void (Context& context)>> keymap =
     { { Key::Modifiers::Alt, 'h' }, repeated(select<SelectMode::Replace>(select_to_eol_reverse)) },
     { { Key::Modifiers::Alt, 'H' }, repeated(select<SelectMode::Extend>(select_to_eol_reverse)) },
 
-    { { Key::Modifiers::Alt, 's' }, do_split_regex },
-
     { { Key::Modifiers::Alt, 'j' }, do_join },
 
     { { Key::Modifiers::None, '<' }, do_deindent },