diff --git a/src/components/categorical/categorical.js b/src/components/categorical/categorical.js
index 22f7b203..05c6d476 100644
--- a/src/components/categorical/categorical.js
+++ b/src/components/categorical/categorical.js
@@ -16,6 +16,12 @@ class Category extends React.Component {
       colorAccessor: this.props.metadataField
     })
   }
+  toggleAll() {
+    this.props.dispatch({
+      type: "categorical metadata filter all of these",
+      metadataField: this.props.metadataField
+    })
+  }
   render() {
     return (
       <div style={{
diff --git a/src/middleware/updateCellSelectionMiddleware.js b/src/middleware/updateCellSelectionMiddleware.js
index a0d265c3..f55c40f5 100644
--- a/src/middleware/updateCellSelectionMiddleware.js
+++ b/src/middleware/updateCellSelectionMiddleware.js
@@ -30,7 +30,8 @@ const updateCellSelectionMiddleware = (store) => {
         action.type === "graph brush deselect" ||
         action.type === "categorical metadata filter deselect" ||
         action.type === "categorical metadata filter select" ||
-        action.type === "categorical metadata filter only this"
+        action.type === "categorical metadata filter only this" ||
+        action.type === "categorical metadata filter all of these"
         ;
 
       if (
@@ -158,8 +159,19 @@ const updateCellSelectionMiddleware = (store) => {
           ...s.controls.categoricalAsBooleansMap,
           [action.metadataField]: metadataFieldWithOnlyThisValueSelected
         }
-        console.log('within', metadataFieldWithOnlyThisValueSelected)
 
+      } else if (action.type === "categorical metadata filter all of these") {
+        const metadataFieldWithAllOfTheseValueSelected = {};
+
+        /* set EVERYTHING to false in this intermediate object */
+        _.each(s.controls.categoricalAsBooleansMap[action.metadataField], (isActive, option) => {
+          metadataFieldWithAllOfTheseValueSelected[option] = true;
+        })
+
+        newCategoricalAsBooleansMap = {
+          ...s.controls.categoricalAsBooleansMap,
+          [action.metadataField]: metadataFieldWithAllOfTheseValueSelected
+        }
       }
 
       const inactiveCategories = [];
diff --git a/src/reducers/controls.js b/src/reducers/controls.js
index eb59c160..590065fb 100644
--- a/src/reducers/controls.js
+++ b/src/reducers/controls.js
@@ -94,6 +94,11 @@ const Controls = (state = {
       categoricalAsBooleansMap: action.newCategoricalAsBooleansMap, /* this comes from middleware */
       currentCellSelection: action.newSelection /* this comes from middleware */
     })
+  case "categorical metadata filter all of these":
+    return Object.assign({}, state, {
+      categoricalAsBooleansMap: action.newCategoricalAsBooleansMap, /* this comes from middleware */
+      currentCellSelection: action.newSelection /* this comes from middleware */
+    })
   /*******************************
             Color Scale
   *******************************/