diff --git a/src/components/map/Map.js b/src/components/map/Map.js
index 4b31a7b..7cbf956 100644
--- a/src/components/map/Map.js
+++ b/src/components/map/Map.js
@@ -330,9 +330,7 @@ function Map({
     />
   );
 
-  const mapGrid = map && map.showGrid && (
-    <MapGrid map={map} gridSize={gridSizeNormalized} />
-  );
+  const mapGrid = map && map.showGrid && <MapGrid map={map} />;
 
   const mapMeasure = (
     <MapMeasure
diff --git a/src/components/map/MapEditor.js b/src/components/map/MapEditor.js
index 29a970b..a6b97de 100644
--- a/src/components/map/MapEditor.js
+++ b/src/components/map/MapEditor.js
@@ -7,7 +7,12 @@ import useMapImage from "../../helpers/useMapImage";
 import usePreventOverscroll from "../../helpers/usePreventOverscroll";
 import useStageInteraction from "../../helpers/useStageInteraction";
 
-function MapEditor({ map }) {
+import { MapInteractionProvider } from "../../contexts/MapInteractionContext";
+
+import MapGrid from "./MapGrid";
+import MapGridEditor from "./MapGridEditor";
+
+function MapEditor({ map, onSettingsChange }) {
   const [mapImageSource] = useMapImage(map);
 
   const [stageWidth, setStageWidth] = useState(1);
@@ -29,6 +34,7 @@ function MapEditor({ map }) {
 
   const stageTranslateRef = useRef({ x: 0, y: 0 });
   const mapLayerRef = useRef();
+  const [preventMapInteraction, setPreventMapInteraction] = useState(false);
 
   function handleResize(width, height) {
     setStageWidth(width);
@@ -66,12 +72,30 @@ function MapEditor({ map }) {
     mapLayerRef.current,
     stageScale,
     setStageScale,
-    stageTranslateRef
+    stageTranslateRef,
+    "pan",
+    preventMapInteraction
   );
 
   const containerRef = useRef();
   usePreventOverscroll(containerRef);
 
+  function handleGridChange(inset) {
+    onSettingsChange("grid", {
+      ...map.grid,
+      inset,
+    });
+  }
+
+  const mapInteraction = {
+    stageScale,
+    stageWidth,
+    stageHeight,
+    setPreventMapInteraction,
+    mapWidth,
+    mapHeight,
+  };
+
   return (
     <Box
       sx={{
@@ -96,6 +120,10 @@ function MapEditor({ map }) {
         >
           <Layer ref={mapLayerRef}>
             <Image image={mapImageSource} width={mapWidth} height={mapHeight} />
+            <MapInteractionProvider value={mapInteraction}>
+              <MapGrid map={map} strokeWidth={0.5} />
+              <MapGridEditor map={map} onGridChange={handleGridChange} />
+            </MapInteractionProvider>
           </Layer>
         </Stage>
       </ReactResizeDetector>
diff --git a/src/components/map/MapGrid.js b/src/components/map/MapGrid.js
index f809f61..54bd306 100644
--- a/src/components/map/MapGrid.js
+++ b/src/components/map/MapGrid.js
@@ -10,7 +10,7 @@ import { mapSources as defaultMapSources } from "../../maps";
 import { getStrokeWidth } from "../../helpers/drawing";
 import { getImageLightness } from "../../helpers/image";
 
-function MapGrid({ map, gridSize }) {
+function MapGrid({ map, strokeWidth }) {
   let mapSourceMap = map;
   // Use lowest resolution for grid lightness
   if (map && map.type === "file" && map.resolutions) {
@@ -24,6 +24,10 @@ function MapGrid({ map, gridSize }) {
 
   const gridX = map && map.grid.size.x;
   const gridY = map && map.grid.size.y;
+  const gridSizeNormalized = {
+    x: gridX ? 1 / gridX : 0,
+    y: gridY ? 1 / gridY : 0,
+  };
 
   const { mapWidth, mapHeight } = useContext(MapInteractionContext);
 
@@ -35,6 +39,7 @@ function MapGrid({ map, gridSize }) {
   // When the map changes find the average lightness of its pixels
   useEffect(() => {
     if (mapLoadingStatus === "loaded") {
+      console.log("getting lightness");
       setIsImageLight(getImageLightness(mapImage));
     }
   }, [mapImage, mapLoadingStatus]);
@@ -46,7 +51,12 @@ function MapGrid({ map, gridSize }) {
         key={`grid_x_${x}`}
         points={[x * lineSpacingX, 0, x * lineSpacingX, mapHeight]}
         stroke={isImageLight ? "black" : "white"}
-        strokeWidth={getStrokeWidth(0.1, gridSize, mapWidth, mapHeight)}
+        strokeWidth={getStrokeWidth(
+          strokeWidth,
+          gridSizeNormalized,
+          mapWidth,
+          mapHeight
+        )}
         opacity={0.5}
       />
     );
@@ -57,7 +67,12 @@ function MapGrid({ map, gridSize }) {
         key={`grid_y_${y}`}
         points={[0, y * lineSpacingY, mapWidth, y * lineSpacingY]}
         stroke={isImageLight ? "black" : "white"}
-        strokeWidth={getStrokeWidth(0.1, gridSize, mapWidth, mapHeight)}
+        strokeWidth={getStrokeWidth(
+          strokeWidth,
+          gridSizeNormalized,
+          mapWidth,
+          mapHeight
+        )}
         opacity={0.5}
       />
     );
@@ -66,4 +81,8 @@ function MapGrid({ map, gridSize }) {
   return <Group>{lines}</Group>;
 }
 
+MapGrid.defaultProps = {
+  strokeWidth: 0.1,
+};
+
 export default MapGrid;
diff --git a/src/components/map/MapGridEditor.js b/src/components/map/MapGridEditor.js
new file mode 100644
index 0000000..fdeb0b1
--- /dev/null
+++ b/src/components/map/MapGridEditor.js
@@ -0,0 +1,156 @@
+import React, { useContext, useRef } from "react";
+import { Group, Circle, Rect } from "react-konva";
+
+import MapInteractionContext from "../../contexts/MapInteractionContext";
+
+import * as Vector2 from "../../helpers/vector2";
+
+function MapGridEditor({ map, onGridChange }) {
+  const {
+    mapWidth,
+    mapHeight,
+    stageScale,
+    setPreventMapInteraction,
+  } = useContext(MapInteractionContext);
+
+  const mapSize = { x: mapWidth, y: mapHeight };
+
+  const topLeftHandleRef = useRef();
+  const topRightHandleRef = useRef();
+  const bottomRightHandleRef = useRef();
+  const bottomLeftHandleRef = useRef();
+
+  function handleScaleCircleDragStart() {}
+
+  function handleScaleCircleDragMove(event) {
+    onGridChange(getHandleInset(event.target));
+  }
+
+  function handleScaleCircleDragEnd(event) {
+    onGridChange(getHandleInset(event.target));
+    setPreventMapInteraction(false);
+  }
+
+  function handleInteractivePointerDown() {
+    setPreventMapInteraction(true);
+  }
+
+  function handleInteractivePointerUp() {
+    setPreventMapInteraction(false);
+  }
+
+  const editCircleRadius = Math.max(
+    (Math.min(mapWidth, mapHeight) / 30) * Math.max(1 / stageScale, 1),
+    1
+  );
+
+  const editCircleProps = {
+    radius: editCircleRadius,
+    fill: "rgba(0, 0, 0, 0.5)",
+    stroke: "white",
+    strokeWidth: editCircleRadius / 5,
+    draggable: true,
+    onDragStart: handleScaleCircleDragStart,
+    onDragMove: handleScaleCircleDragMove,
+    onDragEnd: handleScaleCircleDragEnd,
+    onMouseDown: handleInteractivePointerDown,
+    onMouseUp: handleInteractivePointerUp,
+    onTouchStart: handleInteractivePointerDown,
+    onTouchEnd: handleInteractivePointerUp,
+  };
+
+  const editRectProps = {
+    fill: "transparent",
+    stroke: "white",
+    strokeWidth: editCircleRadius / 5,
+  };
+
+  function getHandleInset(handle) {
+    const topLeftHandle = topLeftHandleRef.current;
+    const topRightHandle = topRightHandleRef.current;
+    const bottomRightHandle = bottomRightHandleRef.current;
+    const bottomLeftHandle = bottomLeftHandleRef.current;
+
+    const topLeft = Vector2.divide(
+      { x: topLeftHandle.x(), y: topLeftHandle.y() },
+      mapSize
+    );
+    const topRight = Vector2.divide(
+      { x: topRightHandle.x(), y: topRightHandle.y() },
+      mapSize
+    );
+    const bottomRight = Vector2.divide(
+      { x: bottomRightHandle.x(), y: bottomRightHandle.y() },
+      mapSize
+    );
+    const bottomLeft = Vector2.divide(
+      { x: bottomLeftHandle.x(), y: bottomLeftHandle.y() },
+      mapSize
+    );
+
+    if (handle === topLeftHandle || handle === bottomRightHandle) {
+      return { topLeft, bottomRight };
+    } else {
+      return {
+        topLeft: { x: bottomLeft.x, y: topRight.y },
+        bottomRight: { x: topRight.x, y: bottomLeft.y },
+      };
+    }
+  }
+
+  function getHandlePositions() {
+    const topLeft = Vector2.multiply(map.grid.inset.topLeft, mapSize);
+    const bottomRight = Vector2.multiply(map.grid.inset.bottomRight, mapSize);
+
+    const size = Vector2.subtract(bottomRight, topLeft);
+    const offset = Vector2.multiply(topLeft, -1);
+
+    return {
+      topLeft,
+      topRight: { x: bottomRight.x, y: topLeft.y },
+      bottomRight,
+      bottomLeft: { x: topLeft.x, y: bottomRight.y },
+      size,
+      offset,
+    };
+  }
+
+  const handlePositions = getHandlePositions();
+
+  return (
+    <Group>
+      <Rect
+        width={handlePositions.size.x}
+        height={handlePositions.size.y}
+        offset={handlePositions.offset}
+        {...editRectProps}
+      />
+      <Circle
+        ref={topLeftHandleRef}
+        x={handlePositions.topLeft.x}
+        y={handlePositions.topLeft.y}
+        {...editCircleProps}
+      />
+      <Circle
+        ref={topRightHandleRef}
+        x={handlePositions.topRight.x}
+        y={handlePositions.topRight.y}
+        {...editCircleProps}
+      />
+      <Circle
+        ref={bottomRightHandleRef}
+        x={handlePositions.bottomRight.x}
+        y={handlePositions.bottomRight.y}
+        {...editCircleProps}
+      />
+      <Circle
+        ref={bottomLeftHandleRef}
+        x={handlePositions.bottomLeft.x}
+        y={handlePositions.bottomLeft.y}
+        {...editCircleProps}
+      />
+    </Group>
+  );
+}
+
+export default MapGridEditor;
diff --git a/src/database.js b/src/database.js
index 9af1e57..f512eed 100644
--- a/src/database.js
+++ b/src/database.js
@@ -217,8 +217,7 @@ function loadVersions(db) {
           map.group = "";
           map.grid = {
             size: { x: map.gridX, y: map.gridY },
-            scale: { x: 1, y: 1 },
-            offset: { x: 0, y: 0 },
+            inset: { topLeft: { x: 0, y: 0 }, bottomRight: { x: 1, y: 1 } },
             type: "square",
           };
           delete map.gridX;
diff --git a/src/maps/index.js b/src/maps/index.js
index d008524..0aaa7ea 100644
--- a/src/maps/index.js
+++ b/src/maps/index.js
@@ -23,8 +23,7 @@ export const maps = Object.keys(mapSources).map((key) => ({
   name: Case.capital(key),
   grid: {
     size: { x: 22, y: 22 },
-    scale: { x: 1, y: 1 },
-    offset: { x: 0, y: 0 },
+    inset: { topLeft: { x: 0, y: 0 }, bottomRight: { x: 1, y: 1 } },
     type: "square",
   },
   width: 1024,
diff --git a/src/modals/EditMapModal.js b/src/modals/EditMapModal.js
index 6a11475..855b630 100644
--- a/src/modals/EditMapModal.js
+++ b/src/modals/EditMapModal.js
@@ -87,7 +87,10 @@ function EditMapModal({ isOpen, onDone, map, mapState }) {
         <Label pt={2} pb={1}>
           Edit map
         </Label>
-        <MapEditor map={selectedMapWithChanges} />
+        <MapEditor
+          map={selectedMapWithChanges}
+          onSettingsChange={handleMapSettingsChange}
+        />
         <MapSettings
           map={selectedMapWithChanges}
           mapState={selectedMapStateWithChanges}
diff --git a/src/modals/SelectMapModal.js b/src/modals/SelectMapModal.js
index d7ace9d..8e1b03b 100644
--- a/src/modals/SelectMapModal.js
+++ b/src/modals/SelectMapModal.js
@@ -167,8 +167,7 @@ function SelectMapModal({
           type: "file",
           grid: {
             size: { x: fileGridX, y: fileGridY },
-            scale: { x: 1, y: 1 },
-            offset: { x: 0, y: 0 },
+            inset: { topLeft: { x: 0, y: 0 }, bottomRight: { x: 1, y: 1 } },
             type: "square",
           },
           width: image.width,