diff --git a/client/src/components/menubar/index.js b/client/src/components/menubar/index.js
index d36a4b23..350327d0 100644
--- a/client/src/components/menubar/index.js
+++ b/client/src/components/menubar/index.js
@@ -48,7 +48,7 @@ import { getEmbSubsetView } from "../../util/stateManager/viewStackHelpers";
     tosURL: state.config?.parameters?.about_legal_tos,
     privacyURL: state.config?.parameters?.about_legal_privacy,
     categoricalSelection: state.categoricalSelection,
-    dotplotEnabled: true /* TODO(colinmegill) #632 wire dotplot*/,
+    dotplotEnabled: state.layoutChoice.dotplot,
   };
 })
 class MenuBar extends React.PureComponent {
@@ -195,7 +195,10 @@ class MenuBar extends React.PureComponent {
     dispatch(actions.resetSubsetAction());
   };
 
-  handleDotplotToggle = () => {};
+  handleDotplotToggle = () => {
+    const { dispatch } = this.props;
+    dispatch({ type: "toggle dotplot" });
+  };
 
   render() {
     const {
@@ -265,9 +268,6 @@ class MenuBar extends React.PureComponent {
         <Tooltip
           content="Enable dotplot mode (hides embedding)"
           position="bottom"
-          disabled={
-            false /* TODO(colinmegill) #632 if no genesets or categories*/
-          }
         >
           <AnchorButton
             className={styles.menubarButton}
@@ -277,9 +277,6 @@ class MenuBar extends React.PureComponent {
             onClick={this.handleDotplotToggle}
             active={dotplotEnabled}
             intent={dotplotEnabled ? "primary" : "none"}
-            disabled={
-              false /* TODO(colinmegill) #632 if no genesets or categories*/
-            }
           />
         </Tooltip>
         <Tooltip
diff --git a/client/src/reducers/dotplot.js b/client/src/reducers/dotplot.js
new file mode 100644
index 00000000..96cf3846
--- /dev/null
+++ b/client/src/reducers/dotplot.js
@@ -0,0 +1,24 @@
+const Dotplot = (
+  state = {
+    row: null,
+    column: null,
+  },
+  action
+) => {
+  switch (action.type) {
+    case "set dotplot row":
+      return {
+        ...state,
+        row: action.data,
+      };
+    case "set dotplot column":
+      return {
+        ...state,
+        column: action.data,
+      };
+    default:
+      return state;
+  }
+};
+
+export default Dotplot;
diff --git a/client/src/reducers/layoutChoice.js b/client/src/reducers/layoutChoice.js
index 6687af8e..54166d17 100644
--- a/client/src/reducers/layoutChoice.js
+++ b/client/src/reducers/layoutChoice.js
@@ -24,7 +24,7 @@ function setToDefaultLayout(schema) {
 const LayoutChoice = (
   state = {
     available: [], // all available choices
-    dotplot: true /* todo(colinmegill) #632 wire up inputs */,
+    dotplot: true, // is the dotplot toggled on, or not
     current: undefined, // name of the current layout, eg, 'umap'
     currentDimNames: [], // dimension name
   },
@@ -41,6 +41,14 @@ const LayoutChoice = (
       };
     }
 
+    case "toggle dotplot": {
+      console.log("toggle: state, newstate", state.dotplot, !state.dotplot);
+      return {
+        ...state,
+        dotplot: !state.dotplot,
+      };
+    }
+
     case "set layout choice": {
       const { schema } = nextSharedState.annoMatrix;
       const current = action.layoutChoice;