diff --git a/README.asciidoc b/README.asciidoc
index f63635a5..92e1e951 100644
--- a/README.asciidoc
+++ b/README.asciidoc
@@ -851,6 +851,16 @@ contain some special data:
  * `.`: current selection contents
  * `#`: selection indices (first selection has 1, second has 2, ...)
 
+Default registers
+^^^^^^^^^^^^^^^^^
+
+Most commands using a register default to a specific one if not specified:
+
+ * `"`: default yank, used by yanking and pasting commands like `y`, `p` and `R`
+ * `/`: default search register, used by regex based commands like `s`, `*` or `/`
+ * `@`: default macro register, used by `q` and `Q`
+ * `^`: default mark register, used by `z` and `Z`
+
 Macros
 ~~~~~~
 
diff --git a/src/input_handler.cc b/src/input_handler.cc
index 6b35fcc5..2cb1f379 100644
--- a/src/input_handler.cc
+++ b/src/input_handler.cc
@@ -149,7 +149,12 @@ constexpr StringView register_doc =
     "Special registers:\n"
     "    * %: buffer name\n"
     "    * .: selection contents\n"
-    "    * #: selection index\n";
+    "    * #: selection index\n"
+    "    * [0-9]: selections capture group\n"
+    "    * \": default yank/paste register\n"
+    "    * @: default macro register\n"
+    "    * /: default search register\n"
+    "    * ^: default mark register\n";
 
 class Normal : public InputMode
 {