diff --git a/data/core.yaml b/data/core.yaml
index 407cf7317..0700d2479 100644
--- a/data/core.yaml
+++ b/data/core.yaml
@@ -134,6 +134,8 @@ en:
       description: Reflect this area on the vertical axis.
       key: T
       annotation: Reflected an area.
+      too_large: This can't be reflected because not enough of it is currently visible.
+      connected_to_hidden: This can't be reflected because it is connected to a hidden feature.
     rotate:
       title: Rotate
       description: Rotate this object around its center point.
diff --git a/dist/locales/en.json b/dist/locales/en.json
index bdd861383..b01ffdc6e 100644
--- a/dist/locales/en.json
+++ b/dist/locales/en.json
@@ -163,6 +163,14 @@
                 "too_large": "This can't be moved because not enough of it is currently visible.",
                 "connected_to_hidden": "This can't be moved because it is connected to a hidden feature."
             },
+            "reflect": {
+                "title": "reflect",
+                "description": "Reflect this area on the vertical axis.",
+                "key": "T",
+                "annotation": "Reflected an area.",
+                "too_large": "This can't be reflected because not enough of it is currently visible.",
+                "connected_to_hidden": "This can't be reflected because it is connected to a hidden feature."
+            },
             "rotate": {
                 "title": "Rotate",
                 "description": "Rotate this object around its center point.",
diff --git a/modules/actions/index.js b/modules/actions/index.js
index 0ad5fad9a..e45777bf8 100644
--- a/modules/actions/index.js
+++ b/modules/actions/index.js
@@ -31,4 +31,4 @@ export { actionRotateWay } from './rotate_way';
 export { actionSplit } from './split';
 export { actionStraighten } from './straighten';
 export { actionUnrestrictTurn } from './unrestrict_turn';
-export { actionReflect } from './flip';
+export { actionReflect } from './reflect.js';
diff --git a/modules/actions/flip.js b/modules/actions/reflect.js
similarity index 97%
rename from modules/actions/flip.js
rename to modules/actions/reflect.js
index 8464b3265..394948c35 100644
--- a/modules/actions/flip.js
+++ b/modules/actions/reflect.js
@@ -3,7 +3,7 @@ import _ from 'lodash';
 Only operates on "area" ways
 */
 
-export function actionFlip(wayId) {
+export function actionReflect(wayId) {
 
     return function (graph) {        
         const targetWay = graph.entity(wayId);
diff --git a/modules/operations/index.js b/modules/operations/index.js
index bd4058f5d..fd8882b3e 100644
--- a/modules/operations/index.js
+++ b/modules/operations/index.js
@@ -9,3 +9,4 @@ export { operationReverse } from './reverse';
 export { operationRotate } from './rotate';
 export { operationSplit } from './split';
 export { operationStraighten } from './straighten';
+export { operationReflect } from './reflect';
\ No newline at end of file
diff --git a/modules/operations/reflect.js b/modules/operations/reflect.js
index ee9d0840c..51ae03afc 100644
--- a/modules/operations/reflect.js
+++ b/modules/operations/reflect.js
@@ -2,11 +2,14 @@ import { t } from '../util/locale';
 import { actionReflect } from '../actions/index';
 
 export function operationReflect(selectedIDs, context) {
-    var entityId = selectedIDs[0];
+    const entityId = selectedIDs[0];
+    const entity = context.entity(entityId);
+    const extent = entity.extent(context.graph());
+    const action = actionReflect(entityId);
 
     var operation = function() {
         context.perform(
-            actionReflect(entityId, false),
+            action,
             t('operations.reflect.annotation')
         );
     };
@@ -17,7 +20,13 @@ export function operationReflect(selectedIDs, context) {
     };
 
     operation.disabled = function() {
-        return false;
+        if (extent.percentContainedIn(context.extent()) < 0.8) {
+            return 'too_large';
+        } else if (context.hasHiddenConnections(entityId)) {
+            return 'connected_to_hidden';
+        } else {
+            return false;
+        }
     };
 
     operation.tooltip = function() {
diff --git a/test/spec/actions/flip.js b/test/spec/actions/reflect.js
similarity index 86%
rename from test/spec/actions/flip.js
rename to test/spec/actions/reflect.js
index b683e466e..f8573d148 100644
--- a/test/spec/actions/flip.js
+++ b/test/spec/actions/reflect.js
@@ -1,6 +1,6 @@
-describe('iD.actionFlip', function() {
+describe('iD.actionReflect', function() {
 
-     it('flips horizontally - does not change graph length', function () {
+     it('reflects horizontally - does not change graph length', function () {
         var graph = iD.Graph([
                 iD.Node({id: 'a', loc: [0, 0]}),
                 iD.Node({id: 'b', loc: [2, 0]}),
@@ -9,12 +9,12 @@ describe('iD.actionFlip', function() {
                 iD.Way({id: '-', nodes: ['a', 'b', 'c', 'd', 'a'], tags: { area: 'yes'}})
             ]);
 
-        graph = iD.actionFlip('-')(graph);
+        graph = iD.actionReflect('-')(graph);
 
         expect(graph.entity('-').nodes).to.have.length(5);
      });
 
-     it('flips horizontally - alters x value', function () {
+     it('reflects horizontally - alters x value', function () {
         var graph = iD.Graph([
                 iD.Node({id: 'a', loc: [0, 0]}),
                 iD.Node({id: 'b', loc: [2, 0]}),
@@ -22,14 +22,14 @@ describe('iD.actionFlip', function() {
                 iD.Node({id: 'd', loc: [0, 2]}),
                 iD.Way({id: '-', nodes: ['a', 'b', 'c', 'd', 'a'], tags: { area: 'yes'}})
             ]);
-        graph = iD.actionFlip('-')(graph);
+        graph = iD.actionReflect('-')(graph);
         expect(graph.entity('a').loc[0]).to.equal(2); // A should be 2,0 now
         expect(graph.entity('b').loc[0]).to.equal(0); // B should be 0,0 now
         expect(graph.entity('c').loc[0]).to.equal(0); // C should be 0,2 now
         expect(graph.entity('d').loc[0]).to.equal(2); // D should be 2,2 now
     });
 
-     it('flips horizontally - does not alter y value', function () {
+     it('reflects horizontally - does not alter y value', function () {
         var graph = iD.Graph([
                 iD.Node({id: 'a', loc: [0, 0]}),
                 iD.Node({id: 'b', loc: [2, 0]}),
@@ -37,7 +37,7 @@ describe('iD.actionFlip', function() {
                 iD.Node({id: 'd', loc: [0, 2]}),
                 iD.Way({id: '-', nodes: ['a', 'b', 'c', 'd', 'a'], tags: { area: 'yes'}})
             ]);
-        graph = iD.actionFlip('-')(graph);
+        graph = iD.actionReflect('-')(graph);
         expect(graph.entity('a').loc[1]).to.equal(0); // A should be 2,0 now
         expect(graph.entity('b').loc[1]).to.equal(0); // B should be 0,0 now
         expect(graph.entity('c').loc[1]).to.equal(2); // C should be 0,2 now
@@ -52,7 +52,7 @@ describe('iD.actionFlip', function() {
                 iD.Node({id: 'd', loc: [0, 2]}),
                 iD.Way({id: '-', nodes: ['a', 'b', 'c', 'd', 'a']})
             ]);
-        graph = iD.actionFlip('-')(graph);
+        graph = iD.actionReflect('-')(graph);
         // should be no change
         expect(graph.entity('a').loc[0]).to.equal(0); 
         expect(graph.entity('b').loc[0]).to.equal(2); 
@@ -68,7 +68,7 @@ describe('iD.actionFlip', function() {
                 iD.Node({id: 'd', loc: [0, 2]}),
                 iD.Way({id: '-', nodes: ['a', 'b', 'c', 'd', 'a']})
             ]);
-        graph = iD.actionFlip('-')(graph);
+        graph = iD.actionReflect('-')(graph);
         // should be no change
         expect(graph.entity('a').loc[1]).to.equal(0); 
         expect(graph.entity('b').loc[1]).to.equal(0);