diff --git a/README.md b/README.md
index 7b5bc6f..19e66b3 100644
--- a/README.md
+++ b/README.md
@@ -130,7 +130,7 @@ scroll_step = 1.15
 flashlight_radius = 180
 
 [editor]
-backend = "builtin"   # or "satty"
+backend = "builtin"   # or "satty", or "noctalia" (its annotator)
 
 [sound]
 enabled = true
diff --git a/docs/test-checklist.md b/docs/test-checklist.md
index 87ab451..2be5fbe 100644
--- a/docs/test-checklist.md
+++ b/docs/test-checklist.md
@@ -80,6 +80,7 @@ image, a cancel brought the thumbnail back, and a swipe still dismissed it.
 ## Editor (Phase 5a)
 
 - [ ] Clicking a preview opens `valw edit` (title `<name> — valw`); `[editor] backend = "satty"` still opens Satty.
+- [ ] `[editor] backend = "noctalia"`: clicking a preview opens the shot in Noctalia's annotator, in the Noctalia theme; Save writes a new "annotated" file in the screenshots folder (the shot stays as it was), Copy puts the result on the clipboard.
 - [ ] Each tool draws (arrow head at the release point, outline rectangle/ellipse, line, pen dot on a click, translucent highlighter); Shift snaps lines to 45° and makes squares/circles.
 - [ ] Colours and S/M/L change new shapes only; A/R/O/L/P/H switch tools.
 - [ ] Ctrl+Z / Ctrl+Shift+Z / Ctrl+Y and the toolbar buttons undo and redo.
diff --git a/src/config.rs b/src/config.rs
index 89f2226..37e618d 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -68,6 +68,9 @@ pub enum Backend {
     #[default]
     Builtin,
     Satty,
+    /// Noctalia's annotator: it saves a new "annotated" file instead of
+    /// overwriting the shot.
+    Noctalia,
 }
 
 #[derive(Debug, Clone, PartialEq, Deserialize)]
@@ -285,6 +288,8 @@ mod tests {
         assert_eq!(Config::default().editor.backend, Backend::Builtin);
         let (config, _) = parse("[editor]\nbackend = \"satty\"\n").unwrap();
         assert_eq!(config.editor.backend, Backend::Satty);
+        let (config, _) = parse("[editor]\nbackend = \"noctalia\"\n").unwrap();
+        assert_eq!(config.editor.backend, Backend::Noctalia);
         assert!(parse("[editor]\nbackend = \"gimp\"\n").is_err());
     }
 
diff --git a/src/host.rs b/src/host.rs
index dd27a80..16e2b74 100644
--- a/src/host.rs
+++ b/src/host.rs
@@ -501,8 +501,9 @@ fn add(state: &mut State, path: &Path, output_name: &str) -> Result<()> {
     Ok(())
 }
 
-/// The command that opens `path` in the configured editor; both save over
-/// the file.
+/// The command that opens `path` in the configured editor. The built-in
+/// editor and Satty save over the file; Noctalia's annotator saves a new
+/// one next to it (or copies), leaving the shot as it was.
 fn editor_command(backend: Backend, path: &Path, exe: &Path) -> std::process::Command {
     let mut command = match backend {
         Backend::Builtin => {
@@ -518,6 +519,11 @@ fn editor_command(backend: Backend, path: &Path, exe: &Path) -> std::process::Co
                 .arg(path);
             c
         }
+        Backend::Noctalia => {
+            let mut c = std::process::Command::new("noctalia");
+            c.args(["msg", "annotate"]).arg(path);
+            c
+        }
     };
     command
         .stdin(std::process::Stdio::null())
@@ -573,6 +579,12 @@ mod tests {
                 "/p/Shot 1.png"
             ]
         );
+        let noctalia = editor_command(Backend::Noctalia, path, exe);
+        assert_eq!(noctalia.get_program(), "noctalia");
+        assert_eq!(
+            noctalia.get_args().collect::<Vec<_>>(),
+            ["msg", "annotate", "/p/Shot 1.png"]
+        );
     }
 
     #[test]