diff --git a/docs/config.md b/docs/config.md
index 8dd600a576..b3a1629484 100644
--- a/docs/config.md
+++ b/docs/config.md
@@ -386,6 +386,18 @@ command will be executed directly. For example:
 ui.pager = ["sh", "-c", "diff-so-fancy | less -RFX"]
 ```
 
+Some formatters (like [`delta`](https://github.com/dandavison/delta)) require
+git style diffs for formatting. You can configure this style of
+diff as the default with the `ui.diff` setting. For example:
+
+```toml
+[ui]
+pager = "delta"
+
+[ui.diff]
+format = "git"
+```
+
 ## Aliases
 
 You can define aliases for commands, including their arguments. For example: