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-rw-r--r--book/src/configuration.md7
1 files changed, 6 insertions, 1 deletions
diff --git a/book/src/configuration.md b/book/src/configuration.md
index a43ede76..de33c1ad 100644
--- a/book/src/configuration.md
+++ b/book/src/configuration.md
@@ -340,7 +340,12 @@ Currently unused
#### `[editor.gutters.diff]` Section
-Currently unused
+The `diff` gutter option displays colored bars indicating whether a `git` diff represents that a line was added, removed or changed.
+These colors are controlled by the theme attributes `diff.plus`, `diff.minus` and `diff.delta`.
+
+Other diff providers will eventually be supported by a future plugin system.
+
+There are currently no options for this section.
#### `[editor.gutters.spacer]` Section