diff --git a/crates/engine/src/cmd/docmenu.rs b/crates/engine/src/cmd/docmenu.rs
index fd9dbaae7..2cbd4a3b9 100644
--- a/crates/engine/src/cmd/docmenu.rs
+++ b/crates/engine/src/cmd/docmenu.rs
@@ -153,7 +153,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Lock Guides",
             ["View", "Guides"],
             Some("Cmd+Alt+;"),
-            "{locked?: bool} toggle (or set) the session's guide lock → {locked}",
+            "{locked?: bool} toggle (or set) the session's guide lock; locking deselects the ruler guides and guide paths in every open document → {locked}",
             has_doc,
             lock_guides
         ),
@@ -601,12 +601,20 @@ fn release_guides(s: &mut Session, p: &Value) -> Result<Value> {
 fn lock_guides(s: &mut Session, p: &Value) -> Result<Value> {
     let v = p.get("locked").and_then(Value::as_bool).unwrap_or(!s.menu.guides_locked);
     s.menu.guides_locked = v;
-    // Locked guides can't stay selected, ruler guides or guide paths ([`Session::select`] lets
-    // those go).
+    // Locked guides can't stay selected, ruler guides or guide paths, in any open document
+    // ([`Session::select`] lets those go in the active one).
     let st = s.doc()?;
     if v && (!st.selection.guides.is_empty() || st.selection.objects.iter().any(|id| crate::is_guide_path(&st.doc, *id))) {
         s.select(|_, sel| sel.guides.clear())?;
     }
+    if v {
+        let active = s.active;
+        for (i, st) in s.docs.iter_mut().enumerate() {
+            if Some(i) != active && crate::deselect_guides(&st.doc, &mut st.selection) {
+                st.revision += 1;
+            }
+        }
+    }
     Ok(json!({ "locked": v }))
 }
 
diff --git a/crates/engine/src/cmd/edit.rs b/crates/engine/src/cmd/edit.rs
index 9c5bbd559..eaa50e514 100644
--- a/crates/engine/src/cmd/edit.rs
+++ b/crates/engine/src/cmd/edit.rs
@@ -371,6 +371,7 @@ pub(crate) fn settle_interaction(s: &mut Session) -> Result<()> {
 
 fn undo(s: &mut Session, _: &Value) -> Result<Value> {
     settle_interaction(s)?;
+    let guides_locked = s.menu.guides_locked;
     let st = s.doc_mut()?;
     let e = st.history.undo.pop().ok_or_else(|| EngineError::Other("nothing to undo".into()))?;
     let label = e.label.clone();
@@ -383,12 +384,17 @@ fn undo(s: &mut Session, _: &Value) -> Result<Value> {
     st.history.trim();
     st.revision += 1;
     st.selection.prune(&st.doc);
+    // Guides locked since the step was made stay deselected.
+    if guides_locked {
+        crate::deselect_guides(&st.doc, &mut st.selection);
+    }
     super::maskedit::follow_history(st, editing);
     Ok(json!({ "undone": label }))
 }
 
 fn redo(s: &mut Session, _: &Value) -> Result<Value> {
     settle_interaction(s)?;
+    let guides_locked = s.menu.guides_locked;
     let st = s.doc_mut()?;
     let e = st.history.redo.pop().ok_or_else(|| EngineError::Other("nothing to redo".into()))?;
     let label = e.label.clone();
@@ -401,6 +407,9 @@ fn redo(s: &mut Session, _: &Value) -> Result<Value> {
     st.history.trim();
     st.revision += 1;
     st.selection.prune(&st.doc);
+    if guides_locked {
+        crate::deselect_guides(&st.doc, &mut st.selection);
+    }
     super::maskedit::follow_history(st, editing);
     Ok(json!({ "redone": label }))
 }
diff --git a/crates/engine/src/cmd/fileio/batch.rs b/crates/engine/src/cmd/fileio/batch.rs
index 9ff293dfb..02d8c7246 100644
--- a/crates/engine/src/cmd/fileio/batch.rs
+++ b/crates/engine/src/cmd/fileio/batch.rs
@@ -99,7 +99,7 @@ fn run_steps(s: &mut Session, label: &str, artboard: Option<u64>, cmds: &mut [Va
 /// ones close, closed or replaced ones (`stash`) come back, and each has its art, selection,
 /// history, file, format and saved state again (#1697: undoing the batch's interaction alone left
 /// a Save As step's new file and an Undo step's history in place). Files the steps wrote stay
-/// written.
+/// written. Lock Guides stays as the steps left it, and while it is on the guides are deselected.
 fn roll_back(s: &mut Session, start: Vec<DocState>, stash: &[DocState]) {
     let open = std::mem::take(&mut s.docs);
     s.docs = start;
@@ -107,5 +107,8 @@ fn roll_back(s: &mut Session, start: Vec<DocState>, stash: &[DocState]) {
         // Past the newest revision the document reached, so the restored one redraws.
         let newest = open.iter().chain(stash).filter(|d| d.uid == st.uid).map(|d| d.revision).max().unwrap_or(st.revision);
         st.revision = newest.saturating_add(1);
+        if s.menu.guides_locked {
+            crate::deselect_guides(&st.doc, &mut st.selection);
+        }
     }
 }
diff --git a/crates/engine/src/cmd/object.rs b/crates/engine/src/cmd/object.rs
index bd71c073e..d806d9c80 100644
--- a/crates/engine/src/cmd/object.rs
+++ b/crates/engine/src/cmd/object.rs
@@ -1061,11 +1061,16 @@ fn isolate(s: &mut Session, p: &Value) -> Result<Value> {
 }
 
 fn exit_isolation(s: &mut Session, _: &Value) -> Result<Value> {
+    let guides_locked = s.menu.guides_locked;
     let st = s.doc_mut()?;
     if let Some(i) = st.isolation.take() {
         super::distortcmds::finish_edit_text(st, i);
         let target = st.doc.parent_of(i).filter(|p| st.doc.node(*p).is_some_and(|n| n.extras().shaper.is_some())).unwrap_or(i);
         st.selection.set([target]);
+        // A guide path isolated while Lock Guides is on isn't selected (#1534).
+        if guides_locked {
+            crate::deselect_guides(&st.doc, &mut st.selection);
+        }
     }
     st.revision += 1;
     ok()
diff --git a/crates/engine/src/lib.rs b/crates/engine/src/lib.rs
index 526b915a8..27fc05e5b 100644
--- a/crates/engine/src/lib.rs
+++ b/crates/engine/src/lib.rs
@@ -682,6 +682,18 @@ pub(crate) fn is_guide_path(d: &Document, id: NodeId) -> bool {
     d.node(id).is_some_and(|n| matches!(n.kind, NodeKind::Path { guide: true, .. }))
 }
 
+/// Deselect the ruler guides and the paths made into guides: while View → Guides → Lock Guides is
+/// on, they can't be selected (#1534), whatever selects them. → whether any was selected.
+pub(crate) fn deselect_guides(d: &Document, sel: &mut Selection) -> bool {
+    let paths: Vec<NodeId> = sel.objects.iter().copied().filter(|id| is_guide_path(d, *id)).collect();
+    let any = !paths.is_empty() || !sel.guides.is_empty();
+    for id in paths {
+        sel.remove(id);
+    }
+    sel.guides.clear();
+    any
+}
+
 /// The error of an edit that would nest objects deeper than [`vectorcraft_doc::MAX_DEPTH`].
 pub const TOO_DEEP: &str = "objects can't be nested more than 32 deep";
 const _: () = assert!(vectorcraft_doc::MAX_DEPTH == 32, "TOO_DEEP (and its catalog rows) names the cap");
@@ -1598,6 +1610,7 @@ impl Session {
         if !self.previewing && cmd::typing_in_progress(self) {
             cmd::settle_interaction(self)?;
         }
+        let guides_locked = self.menu.guides_locked;
         let st = self.doc_mut()?;
         let before = st.doc.clone();
         let before_sel = st.selection.clone();
@@ -1645,6 +1658,10 @@ impl Session {
         match result {
             Ok(v) => {
                 st.selection.prune(&st.doc);
+                // An edit that selects what it unlocks, shows or pastes leaves locked guides out.
+                if guides_locked {
+                    deselect_guides(&st.doc, &mut st.selection);
+                }
                 st.revision += 1;
                 if st.interaction.is_none() {
                     let selection = match st.history.undo.last() {
@@ -1673,10 +1690,7 @@ impl Session {
         st.selection.prune(&st.doc);
         // Lock Guides locks the paths made into guides too (#1534), whatever selects them.
         if guides_locked {
-            let locked: Vec<NodeId> = st.selection.objects.iter().copied().filter(|id| is_guide_path(&st.doc, *id)).collect();
-            for id in locked {
-                st.selection.remove(id);
-            }
+            deselect_guides(&st.doc, &mut st.selection);
         }
         // Selecting art makes its layer (or sublayer) the current one, as in the Layers panel of
         // the reference app: new art then goes beside it.
@@ -1807,7 +1821,13 @@ impl Session {
 
     pub fn cancel_interaction(&mut self) -> Result<()> {
         self.pending_paint = None;
-        self.doc_mut()?.undo_interaction();
+        let guides_locked = self.menu.guides_locked;
+        let st = self.doc_mut()?;
+        st.undo_interaction();
+        // Guides locked during the interaction stay deselected.
+        if guides_locked {
+            deselect_guides(&st.doc, &mut st.selection);
+        }
         Ok(())
     }
 
@@ -1849,6 +1869,9 @@ impl Session {
             {
                 st.doc = e.doc;
                 st.selection = Arc::unwrap_or_clone(e.selection);
+                if self.menu.guides_locked {
+                    deselect_guides(&st.doc, &mut st.selection);
+                }
                 st.revision += 1;
                 journal = Some(g.journal);
             }
diff --git a/crates/engine/src/tests_menucmds.rs b/crates/engine/src/tests_menucmds.rs
index 9af6d3c1e..4bc6f8f76 100644
--- a/crates/engine/src/tests_menucmds.rs
+++ b/crates/engine/src/tests_menucmds.rs
@@ -1860,6 +1860,139 @@ fn locked_guides_lock_guide_paths() {
     assert_eq!(selected(&s), vec![b]);
 }
 
+/// A rectangle at (`x`, 0), 10 pt wide, made into a guide; nothing is selected after.
+fn guide_path(s: &mut Session, x: f64) -> NodeId {
+    let g = rect(s, x, 0.0, 10.0, 10.0);
+    sel(s, &[g]);
+    s.execute("view.guides.make", &json!({})).unwrap();
+    g
+}
+
+/// Exit Isolation Mode selects the isolated art, except a guide path while Lock Guides is on, so
+/// a move after it leaves the guide where it is.
+#[test]
+fn exit_isolation_leaves_a_locked_guide_path_deselected() {
+    let mut s = session();
+    let g = guide_path(&mut s, 0.0);
+    s.execute("view.guides.lock", &json!({"locked": true})).unwrap();
+    s.execute("object.isolate", &json!({"id": g.0})).unwrap();
+    s.execute("object.exitIsolation", &json!({})).unwrap();
+    assert!(selected(&s).is_empty());
+    let _ = s.execute("object.move", &json!({"dx": 10, "dy": 0}));
+    assert_eq!(bounds(&s, g).x0, 0.0);
+    // Lock Guides off: the guide is selected.
+    s.execute("view.guides.lock", &json!({"locked": false})).unwrap();
+    s.execute("object.isolate", &json!({"id": g.0})).unwrap();
+    s.execute("object.exitIsolation", &json!({})).unwrap();
+    assert_eq!(selected(&s), vec![g]);
+}
+
+/// Undo and Redo bring back a selection without the guides, ruler guides or guide paths, that
+/// Lock Guides has locked since, so a move after them leaves the guides where they are.
+#[test]
+fn undo_and_redo_leave_locked_guides_deselected() {
+    let mut s = session();
+    let g = guide_path(&mut s, 0.0);
+    s.execute("guide.add", &json!({"vertical": true, "pos": 100})).unwrap();
+    let select_both = |s: &mut Session| {
+        sel(s, &[g]);
+        s.execute("guide.select", &json!({"indexes": [0], "toggle": true})).unwrap();
+    };
+    select_both(&mut s);
+    s.execute("object.move", &json!({"dx": 10, "dy": 0})).unwrap();
+    assert_eq!((bounds(&s, g).x0, guides(&s)), (10.0, vec![(true, 110.0)]));
+    s.execute("view.guides.lock", &json!({"locked": true})).unwrap();
+    s.execute("edit.undo", &json!({})).unwrap();
+    assert_eq!((selected(&s), selected_guides(&s)), (vec![], vec![]), "after Undo");
+    let _ = s.execute("object.move", &json!({"dx": 10, "dy": 0}));
+    assert_eq!((bounds(&s, g).x0, guides(&s)), (0.0, vec![(true, 100.0)]));
+    // Undone with both selected, redone once they are locked.
+    s.execute("view.guides.lock", &json!({"locked": false})).unwrap();
+    select_both(&mut s);
+    s.execute("object.move", &json!({"dx": 10, "dy": 0})).unwrap();
+    s.execute("edit.undo", &json!({})).unwrap();
+    s.execute("view.guides.lock", &json!({"locked": true})).unwrap();
+    s.execute("edit.redo", &json!({})).unwrap();
+    assert_eq!((selected(&s), selected_guides(&s)), (vec![], vec![]), "after Redo");
+    let _ = s.execute("object.move", &json!({"dx": 10, "dy": 0}));
+    assert_eq!((bounds(&s, g).x0, guides(&s)), (10.0, vec![(true, 110.0)]));
+}
+
+/// Unlock All, Show All and Paste select the art they unlock, show or paste, except guide paths
+/// while Lock Guides is on.
+#[test]
+fn unlock_all_show_all_and_paste_leave_locked_guide_paths_deselected() {
+    let mut s = session();
+    let (g, h) = (guide_path(&mut s, 0.0), guide_path(&mut s, 20.0));
+    sel(&mut s, &[g]);
+    s.execute("edit.copy", &json!({})).unwrap();
+    s.execute("object.lock", &json!({})).unwrap();
+    sel(&mut s, &[h]);
+    s.execute("object.hide", &json!({})).unwrap();
+    s.execute("view.guides.lock", &json!({"locked": true})).unwrap();
+    assert_eq!(s.execute("object.unlockAll", &json!({})).unwrap()["count"], 1);
+    assert!(selected(&s).is_empty(), "after Unlock All");
+    assert_eq!(s.execute("object.showAll", &json!({})).unwrap()["count"], 1);
+    assert!(selected(&s).is_empty(), "after Show All");
+    s.execute("edit.paste", &json!({})).unwrap();
+    assert!(selected(&s).is_empty(), "after Paste");
+    // Lock Guides off: the pasted guide is selected.
+    s.execute("view.guides.lock", &json!({"locked": false})).unwrap();
+    s.execute("edit.paste", &json!({})).unwrap();
+    let [copy] = selected(&s)[..] else { panic!("the pasted guide is selected") };
+    assert!(crate::is_guide_path(&s.doc().unwrap().doc, copy));
+}
+
+/// Lock Guides deselects the guides of every open document, not only the active one's.
+#[test]
+fn lock_guides_deselects_the_guides_of_every_open_document() {
+    let mut s = session();
+    let g = guide_path(&mut s, 0.0);
+    s.execute("guide.add", &json!({"vertical": true, "pos": 100})).unwrap();
+    sel(&mut s, &[g]);
+    s.execute("guide.select", &json!({"indexes": [0], "toggle": true})).unwrap();
+    s.execute("file.new", &json!({"width": 800, "height": 600})).unwrap();
+    s.execute("view.guides.lock", &json!({"locked": true})).unwrap();
+    s.execute("document.activate", &json!({"index": 0})).unwrap();
+    assert_eq!((selected(&s), selected_guides(&s)), (vec![], vec![]));
+}
+
+/// A failed batch and a canceled undo group bring back the selection from before them, without
+/// the guide paths that Lock Guides locked inside them.
+#[test]
+fn a_failed_batch_and_a_canceled_undo_group_leave_locked_guides_deselected() {
+    let mut s = session();
+    let g = guide_path(&mut s, 0.0);
+    sel(&mut s, &[g]);
+    let steps = json!([{"command": "view.guides.lock", "params": {"locked": true}}, {"command": "object.isolate", "params": {}}]);
+    assert!(s.execute("command.batch", &json!({"commands": steps})).is_err());
+    assert!(s.guides_locked());
+    assert!(selected(&s).is_empty(), "after the failed batch");
+    s.execute("view.guides.lock", &json!({"locked": false})).unwrap();
+    sel(&mut s, &[g]);
+    s.execute("edit.undoGroup.begin", &json!({})).unwrap();
+    s.execute("object.move", &json!({"dx": 10, "dy": 0})).unwrap();
+    s.execute("view.guides.lock", &json!({"locked": true})).unwrap();
+    s.execute("edit.undoGroup.end", &json!({"cancel": true})).unwrap();
+    assert_eq!(bounds(&s, g).x0, 0.0);
+    assert!(selected(&s).is_empty(), "after the canceled undo group");
+}
+
+/// Canceling a drag or a dialog's preview brings back the selection from before it, without the
+/// guide paths that Lock Guides locked during it.
+#[test]
+fn a_canceled_interaction_leaves_locked_guides_deselected() {
+    let mut s = session();
+    let g = guide_path(&mut s, 0.0);
+    sel(&mut s, &[g]);
+    s.begin_interaction("Move").unwrap();
+    s.preview("object.move", &json!({"dx": 10, "dy": 0})).unwrap();
+    s.execute("view.guides.lock", &json!({"locked": true})).unwrap();
+    s.cancel_interaction().unwrap();
+    assert_eq!(bounds(&s, g).x0, 0.0);
+    assert!(selected(&s).is_empty());
+}
+
 fn guides(s: &Session) -> Vec<(bool, f64)> {
     s.doc().unwrap().doc.guides.iter().map(|g| (g.vertical, g.pos)).collect()
 }
diff --git a/docs/mcp.md b/docs/mcp.md
index c48f2b99b..b2a23b9a0 100644
--- a/docs/mcp.md
+++ b/docs/mcp.md
@@ -1078,7 +1078,9 @@ removes them) → `{selected}`. `guide.move {index, pos}` puts one guide somewhe
 moves the selected ones (vertical guides by `dx`, horizontal ones by `dy`; `copy` leaves them and selects the
 moved copies), and `guide.remove {index?}` deletes one guide or the selected ones → `{count}`; each is one undo
 step. With guides selected, `edit.clear` (Delete) deletes them and `object.nudge` (the arrow keys) nudges them.
-View › Guides › Lock Guides (`view.guides.lock`) deselects them and refuses these commands until unlocked.
+View › Guides › Lock Guides (`view.guides.lock`) deselects them and the paths made into guides, in every open
+document, and refuses these commands until unlocked. While it is on, a command that selects art, such as `edit.undo`,
+`edit.redo`, `object.exitIsolation`, `object.unlockAll`, `object.showAll` or `edit.paste`, leaves the guides out.
 
 `view.guides.release {index?, ids?}` (View › Guides › Release Guides) turns guides into paths → `{count}`. With
 `index` it releases that ruler guide, and with `ids` it releases those guide paths (and the guide paths inside them).