diff --git a/api.md b/api.md
index 7617c53..0b7e20d 100644
--- a/api.md
+++ b/api.md
@@ -23,3 +23,9 @@
 | Event  | Pattern          | Description                              |
 | ------ | ---------------- | ---------------------------------------- |
 | `User` | Name of a plugin | Triggered when the plugin is lazy-loaded |
+
+### Mappings
+
+| Name | Description |
+| --- | --- |
+| `<plug>(plug-preview)` | Opens preview window for the commit on the current line (see [#769](https://github.com/junegunn/vim-plug/pull/769)) |
\ No newline at end of file