diff --git a/ltn/src/auto.rs b/ltn/src/auto.rs
index 6f08154c7e..74ba2442b4 100644
--- a/ltn/src/auto.rs
+++ b/ltn/src/auto.rs
@@ -4,9 +4,8 @@ use abstutil::Timer;
 use map_model::RoadID;
 use widgetry::{Choice, EventCtx};
 
-use super::rat_runs::find_rat_runs;
-use super::Neighborhood;
-use crate::App;
+use crate::rat_runs::find_rat_runs;
+use crate::{after_edit, App, Neighborhood};
 
 #[derive(Clone, Copy, Debug, PartialEq)]
 pub enum Heuristic {
@@ -64,6 +63,7 @@ impl Heuristic {
         }
 
         app.session.modal_filters.cancel_empty_edit();
+        after_edit(ctx, app);
     }
 }
 
diff --git a/ltn/src/browse.rs b/ltn/src/browse.rs
index f1fda1acb4..29cf26e22c 100644
--- a/ltn/src/browse.rs
+++ b/ltn/src/browse.rs
@@ -12,14 +12,13 @@ use widgetry::{
 
 use super::auto::Heuristic;
 use super::{Neighborhood, NeighborhoodID, Partitioning};
-use crate::{App, ModalFilters, Toggle3Zoomed, Transition};
+use crate::{App, ModalFilters, Transition};
 
 pub struct BrowseNeighborhoods {
     panel: Panel,
     world: World<NeighborhoodID>,
     draw_over_roads: ToggleZoomed,
     labels: DrawRoadLabels,
-    draw_all_filters: Toggle3Zoomed,
     draw_boundary_roads: ToggleZoomed,
 }
 
@@ -34,13 +33,13 @@ impl BrowseNeighborhoods {
                     app.session.modal_filters = ModalFilters::default();
                     crate::filters::transform_existing_filters(ctx, app, timer);
                     app.session.partitioning = Partitioning::seed_using_heuristics(app, timer);
+                    app.session.draw_all_filters = app.session.modal_filters.draw(ctx, &app.map);
                 }
                 (
                     make_world(ctx, app, timer),
                     draw_over_roads(ctx, app, timer),
                 )
             });
-        let draw_all_filters = app.session.modal_filters.draw(ctx, &app.map, None);
 
         let panel = Panel::new_builder(Widget::col(vec![
             crate::app_header(ctx, app),
@@ -107,7 +106,6 @@ impl BrowseNeighborhoods {
             world,
             draw_over_roads,
             labels: DrawRoadLabels::only_major_roads(),
-            draw_all_filters,
             draw_boundary_roads: draw_boundary_roads(ctx, app),
         })
     }
@@ -195,7 +193,7 @@ impl State<App> for BrowseNeighborhoods {
         if self.panel.is_checked("highlight boundary roads") {
             self.draw_boundary_roads.draw(g);
         }
-        self.draw_all_filters.draw(g);
+        app.session.draw_all_filters.draw(g);
         if g.canvas.is_unzoomed() {
             self.labels.draw(g, app);
         }
diff --git a/ltn/src/connectivity.rs b/ltn/src/connectivity.rs
index a6c9ae3e87..3389e6e0d2 100644
--- a/ltn/src/connectivity.rs
+++ b/ltn/src/connectivity.rs
@@ -148,7 +148,7 @@ impl State<App> for Viewer {
         g.redraw(&self.neighborhood.fade_irrelevant);
 
         self.panel.draw(g);
-        self.neighborhood.draw_filters.draw(g);
+        app.session.draw_all_filters.draw(g);
         // TODO Since we cover such a small area, treating multiple segments of one road as the
         // same might be nice. And we should seed the quadtree with the locations of filters and
         // arrows, possibly.
diff --git a/ltn/src/filters/mod.rs b/ltn/src/filters/mod.rs
index 7aed531d22..1c68896d83 100644
--- a/ltn/src/filters/mod.rs
+++ b/ltn/src/filters/mod.rs
@@ -10,7 +10,6 @@ use widgetry::mapspace::{DrawUnzoomedShapes, ToggleZoomed};
 use widgetry::{Color, EventCtx, GeomBatch, GfxCtx};
 
 pub use self::existing::transform_existing_filters;
-use super::Neighborhood;
 use crate::App;
 
 /// Stored in App session state. Before making any changes, call `before_edit`.
@@ -84,25 +83,12 @@ impl ModalFilters {
         true
     }
 
-    /// Draw all modal filters. If `only_neighborhood` is specified, only draw filters belonging to
-    /// one area.
-    pub fn draw(
-        &self,
-        ctx: &EventCtx,
-        map: &Map,
-        only_neighborhood: Option<&Neighborhood>,
-    ) -> Toggle3Zoomed {
+    /// Draw all modal filters
+    pub fn draw(&self, ctx: &EventCtx, map: &Map) -> Toggle3Zoomed {
         let mut batch = ToggleZoomed::builder();
         let mut low_zoom = DrawUnzoomedShapes::builder();
 
         for (r, dist) in &self.roads {
-            if only_neighborhood
-                .map(|n| !n.orig_perimeter.interior.contains(r))
-                .unwrap_or(false)
-            {
-                continue;
-            }
-
             let road = map.get_r(*r);
             if let Ok((pt, angle)) = road.center_pts.dist_along(*dist) {
                 let road_width = road.get_width();
@@ -135,14 +121,7 @@ impl ModalFilters {
                 );
             }
         }
-        for (i, filter) in &self.intersections {
-            if only_neighborhood
-                .map(|n| !n.interior_intersections.contains(i))
-                .unwrap_or(false)
-            {
-                continue;
-            }
-
+        for (_, filter) in &self.intersections {
             let line = filter.geometry(map);
 
             // It's really hard to see a tiny squished line thickened, so use the same circle
diff --git a/ltn/src/impact/ui.rs b/ltn/src/impact/ui.rs
index f0c271576f..29f6464c19 100644
--- a/ltn/src/impact/ui.rs
+++ b/ltn/src/impact/ui.rs
@@ -9,14 +9,13 @@ use widgetry::{
 };
 
 use super::{end_of_day, Filters, Impact};
-use crate::{App, BrowseNeighborhoods, Toggle3Zoomed, Transition};
+use crate::{App, BrowseNeighborhoods, Transition};
 
 // TODO Share structure or pieces with Ungap's predict mode
 // ... can't we just produce data of a certain shape, and have a UI pretty tuned for that?
 
 pub struct ShowResults {
     draw_all_neighborhoods: Drawable,
-    draw_all_filters: Toggle3Zoomed,
 }
 
 impl ShowResults {
@@ -66,7 +65,6 @@ impl ShowResults {
         <dyn SimpleState<_>>::new_state(
             panel,
             Box::new(ShowResults {
-                draw_all_filters: app.session.modal_filters.draw(ctx, &app.map, None),
                 draw_all_neighborhoods,
             }),
         )
@@ -153,7 +151,7 @@ impl SimpleState<App> for ShowResults {
     fn draw(&self, g: &mut GfxCtx, app: &App) {
         g.redraw(&self.draw_all_neighborhoods);
         app.session.impact.compare_counts.draw(g);
-        self.draw_all_filters.draw(g);
+        app.session.draw_all_filters.draw(g);
     }
 }
 
diff --git a/ltn/src/lib.rs b/ltn/src/lib.rs
index b12df2e605..457ac86b1c 100644
--- a/ltn/src/lib.rs
+++ b/ltn/src/lib.rs
@@ -5,7 +5,8 @@ use structopt::StructOpt;
 use widgetry::{lctrl, EventCtx, GfxCtx, Key, Line, Settings, Widget};
 
 pub use browse::BrowseNeighborhoods;
-pub use filters::{DiagonalFilter, ModalFilters, Toggle3Zoomed};
+use filters::Toggle3Zoomed;
+pub use filters::{DiagonalFilter, ModalFilters};
 pub use neighborhood::{Cell, DistanceInterval, Neighborhood};
 pub use partition::{NeighborhoodID, Partitioning};
 
@@ -60,6 +61,7 @@ fn run(mut settings: Settings) {
         let session = Session {
             partitioning: Partitioning::empty(),
             modal_filters: ModalFilters::default(),
+            draw_all_filters: Toggle3Zoomed::empty(ctx),
 
             impact: impact::Impact::empty(ctx),
 
@@ -120,6 +122,7 @@ pub fn run_wasm(root_dom_id: String, assets_base_url: String, assets_are_gzipped
 pub struct Session {
     pub partitioning: Partitioning,
     pub modal_filters: ModalFilters,
+    pub draw_all_filters: Toggle3Zoomed,
 
     pub impact: impact::Impact,
 
@@ -213,3 +216,7 @@ fn handle_app_header_click(ctx: &mut EventCtx, app: &App, x: &str) -> Option<Tra
         _ => None,
     }
 }
+
+pub fn after_edit(ctx: &EventCtx, app: &mut App) {
+    app.session.draw_all_filters = app.session.modal_filters.draw(ctx, &app.map);
+}
diff --git a/ltn/src/neighborhood.rs b/ltn/src/neighborhood.rs
index aa9f0a96df..260260021d 100644
--- a/ltn/src/neighborhood.rs
+++ b/ltn/src/neighborhood.rs
@@ -7,7 +7,7 @@ use map_gui::tools::DrawRoadLabels;
 use map_model::{IntersectionID, Map, PathConstraints, Perimeter, RoadID};
 use widgetry::{Drawable, EventCtx, GeomBatch};
 
-use crate::{App, ModalFilters, NeighborhoodID, Toggle3Zoomed};
+use crate::{App, ModalFilters, NeighborhoodID};
 
 pub struct Neighborhood {
     pub id: NeighborhoodID,
@@ -23,7 +23,6 @@ pub struct Neighborhood {
     pub cells: Vec<Cell>,
 
     pub fade_irrelevant: Drawable,
-    pub draw_filters: Toggle3Zoomed,
     pub labels: DrawRoadLabels,
 }
 
@@ -73,7 +72,6 @@ impl Neighborhood {
             cells: Vec::new(),
 
             fade_irrelevant: Drawable::empty(ctx),
-            draw_filters: Toggle3Zoomed::empty(ctx),
             // Temporary value
             labels: DrawRoadLabels::only_major_roads(),
         };
@@ -123,8 +121,6 @@ impl Neighborhood {
             &app.session.modal_filters,
         );
 
-        n.draw_filters = app.session.modal_filters.draw(ctx, map, Some(&n));
-
         let mut label_roads = n.perimeter.clone();
         label_roads.extend(n.orig_perimeter.interior.clone());
         n.labels = DrawRoadLabels::new(Box::new(move |r| label_roads.contains(&r.id)));
diff --git a/ltn/src/pathfinding.rs b/ltn/src/pathfinding.rs
index cc5331a677..218e31e872 100644
--- a/ltn/src/pathfinding.rs
+++ b/ltn/src/pathfinding.rs
@@ -295,7 +295,7 @@ impl State<App> for RoutePlanner {
 
         g.redraw(&self.neighborhood.fade_irrelevant);
         self.draw_routes.draw(g);
-        self.neighborhood.draw_filters.draw(g);
+        app.session.draw_all_filters.draw(g);
         if g.canvas.is_unzoomed() {
             self.neighborhood.labels.draw(g, app);
         }
diff --git a/ltn/src/per_neighborhood.rs b/ltn/src/per_neighborhood.rs
index 6333683a0e..44407dbd12 100644
--- a/ltn/src/per_neighborhood.rs
+++ b/ltn/src/per_neighborhood.rs
@@ -7,8 +7,9 @@ use widgetry::{
     VerticalAlignment, Widget, DEFAULT_CORNER_RADIUS,
 };
 
-use super::{BrowseNeighborhoods, DiagonalFilter, Neighborhood, NeighborhoodID};
-use crate::{App, Transition};
+use crate::{
+    after_edit, App, BrowseNeighborhoods, DiagonalFilter, Neighborhood, NeighborhoodID, Transition,
+};
 
 #[derive(PartialEq)]
 pub enum Tab {
@@ -206,6 +207,7 @@ pub fn handle_world_outcome(
 
                 app.session.modal_filters.roads.insert(r, distance);
             }
+            after_edit(ctx, app);
             true
         }
         WorldOutcome::ClickedObject(FilterableObj::InteriorIntersection(i)) => {
@@ -234,6 +236,7 @@ pub fn handle_world_outcome(
                     .intersections
                     .insert(i, all.remove(0));
             }
+            after_edit(ctx, app);
             true
         }
         WorldOutcome::Keypress("debug", FilterableObj::InteriorIntersection(i)) => {
diff --git a/ltn/src/rat_run_viewer.rs b/ltn/src/rat_run_viewer.rs
index 8b3636f061..a701c0caef 100644
--- a/ltn/src/rat_run_viewer.rs
+++ b/ltn/src/rat_run_viewer.rs
@@ -201,7 +201,7 @@ impl State<App> for BrowseRatRuns {
         }
 
         g.redraw(&self.neighborhood.fade_irrelevant);
-        self.neighborhood.draw_filters.draw(g);
+        app.session.draw_all_filters.draw(g);
         if g.canvas.is_unzoomed() {
             self.neighborhood.labels.draw(g, app);
         }