diff --git a/modules/bus/index.js b/modules/bus/index.js
index 5f9244a5..eb5e5b6d 100644
--- a/modules/bus/index.js
+++ b/modules/bus/index.js
@@ -70,6 +70,10 @@ export default class Bus {
     this.dispatch(token, Object.assign({}, this.state[token], partialState));
   }
 
+  getState(fqn) {
+    return this.state[createToken(fqn)];
+  }
+  
   dispatch(key, data) {
     if (this.lock.has(key)) {
       console.warn('recursive dispatch');
diff --git a/modules/ui/components/AdjustableAbs.jsx b/modules/ui/components/AdjustableAbs.jsx
index bf878b5f..115f422e 100644
--- a/modules/ui/components/AdjustableAbs.jsx
+++ b/modules/ui/components/AdjustableAbs.jsx
@@ -39,9 +39,12 @@ export default class AdjustableAbs extends React.Component {
   }
   
   render() {
-    let {left, top, right, bottom, children, style, zIndex, ...props} = this.props;
+    let {left, top, right, bottom, children, style, zIndex, visible, ...props} = this.props;
     return <div ref={el => this.el = el} 
-                style={{position: 'absolute', left, top, right, bottom, zIndex, ...style}}  {...props}>
+                style={{
+                  display: visible ? 'block' : 'none',
+                  position: 'absolute', left, top, right, bottom, zIndex, 
+                  ...style}}  {...props}>
       {children}
     </div>;
   }
@@ -49,6 +52,7 @@ export default class AdjustableAbs extends React.Component {
 
 AdjustableAbs.defaultProps = {
   zIndex: 100,
+  visible: true
 };
 
 
diff --git a/modules/ui/components/Menu.jsx b/modules/ui/components/Menu.jsx
index 1e0043b1..ec233ccc 100644
--- a/modules/ui/components/Menu.jsx
+++ b/modules/ui/components/Menu.jsx
@@ -5,13 +5,9 @@ import ls from './Menu.less';
 import AuxWidget from "./AuxWidget";
 import cx from 'classnames';
 
-export default function Menu({children, visible, x, y, orientationUp, style, ...props}) {
+export default function Menu({children, x, y, orientationUp, ...props}) {
   return <AuxWidget 
     className={cx(ls.root, 'disable-selection')}
-    style={{
-      display: visible ? 'block' : 'none',
-      ...style
-    }}
     zIndex={500}
     left={x}
     top={orientationUp ? undefined : y}
diff --git a/modules/ui/components/Toolbar.jsx b/modules/ui/components/Toolbar.jsx
index 937da4fc..e0e7013f 100644
--- a/modules/ui/components/Toolbar.jsx
+++ b/modules/ui/components/Toolbar.jsx
@@ -9,8 +9,8 @@ export default function Toolbar({children, className, small, ...props}) {
   </div>; 
 }
 
-export function ToolbarButton({children, disabled}) {
-  return <div className={cx(ls.button, {disabled})}>
+export function ToolbarButton({children, disabled, ...props}) {
+  return <div className={cx(ls.button, disabled && ls.disabled)} {...props}>
     {children}
   </div>;
 }
diff --git a/web/app/cad/actions/actionButtonBehavior.js b/web/app/cad/actions/actionButtonBehavior.js
new file mode 100644
index 00000000..9b7d3e29
--- /dev/null
+++ b/web/app/cad/actions/actionButtonBehavior.js
@@ -0,0 +1,12 @@
+
+import {TOKENS as ACTION_TOKENS} from "./actionSystemPlugin";
+
+export function mapActionBehavior(actionId) {
+  let actionRunToken = ACTION_TOKENS.actionRun(actionId);
+
+  return dispatch => ({
+    onClick: data => dispatch(actionRunToken, data),
+    onMouseEnter: ({pageX, pageY}) => dispatch(ACTION_TOKENS.SHOW_HINT_FOR, [actionId, pageX, pageY]),
+    onMouseLeave: () => dispatch(ACTION_TOKENS.SHOW_HINT_FOR, null)
+  });
+}
\ No newline at end of file
diff --git a/web/app/cad/actions/actionSystemPlugin.js b/web/app/cad/actions/actionSystemPlugin.js
index bea2637d..52ed23c3 100644
--- a/web/app/cad/actions/actionSystemPlugin.js
+++ b/web/app/cad/actions/actionSystemPlugin.js
@@ -40,7 +40,8 @@ export function activate(context) {
     }
     bus.subscribe(TOKENS.actionRun(action.id), (data) => action.invoke(context, data));
   }
-  
+
+  bus.enableState(TOKENS.HINT, null);
   function registerAction(action) {
     register(action);
   }
@@ -48,16 +49,57 @@ export function activate(context) {
   function registerActions(actions) {
     actions.forEach(action => register(action));
   }
-
+  
+  synchActionHint(bus);
+  
   context.services.action = {run, registerAction, registerActions}
 }
 
-export const TOKENS = {
-  ACTION_STATE_NS: 'action.state',
-  ACTION_APPEARANCE_NS: 'action.appearance',
-  ACTION_RUN_NS: 'action.run',
+
+
+function synchActionHint(bus) {
   
-  actionState: (actionId) => createToken(TOKENS.ACTION_STATE_NS, actionId),
-  actionAppearance: (actionId) => createToken(TOKENS.ACTION_APPEARANCE_NS, actionId),
-  actionRun: (actionId) => createToken(TOKENS.ACTION_RUN_NS, actionId),
+  let lastRequest = null;
+  
+  // bus.subscribe(TOKENS.REQUEST_SHOW_HINT_FOR
+  bus.subscribe(TOKENS.SHOW_HINT_FOR, request => {
+    if (lastRequest !== null) {
+      if (request !== null) {
+        if (request[0] === lastRequest[0]) {
+          Object.assign(lastRequest, request);
+          return;
+        }
+      }
+      lastRequest.spoiled = true;
+    }
+    lastRequest = request;
+    if (request) {
+      setTimeout(() => {
+        if (!request.spoiled) {
+          let [actionId, x, y] = request;
+          let actionState = bus.getState(TOKENS.actionState(actionId));
+          let actionAppearance = bus.getState(TOKENS.actionAppearance(actionId));
+          if (actionState && actionAppearance) {
+            bus.dispatch(TOKENS.HINT, {
+              actionId, x: x + 10, y: y + 10,
+              info: actionAppearance.info,
+              hint: actionState.hint
+            });
+          }
+        }
+      }, 500);
+    } else {
+      bus.dispatch(TOKENS.HINT, null);
+    }
+  });
+}
+
+export const ACTION_NS = 'action';
+export const TOKENS = {
+  actionState: (actionId) => createToken(ACTION_NS, 'state', actionId),
+  actionAppearance: (actionId) => createToken(ACTION_NS, 'appearance', actionId),
+  actionRun: (actionId) => createToken(ACTION_NS, 'run', actionId),
+
+  SHOW_HINT_FOR: createToken(ACTION_NS, 'showHintFor'),
+  HINT: createToken(ACTION_NS, 'hint'),
 };
\ No newline at end of file
diff --git a/web/app/cad/dom/actionInfo/ActionInfo.jsx b/web/app/cad/dom/actionInfo/ActionInfo.jsx
new file mode 100644
index 00000000..ffb3cf77
--- /dev/null
+++ b/web/app/cad/dom/actionInfo/ActionInfo.jsx
@@ -0,0 +1,24 @@
+import React, {Fragment} from 'react';
+import ls from './ActionInfo.less';
+
+import AuxWidget from '../../../../../modules/ui/components/AuxWidget';
+import connect from '../../../../../modules/ui/connect';
+import {TOKENS as ACTION_TOKENS} from '../../actions/actionSystemPlugin';
+import {TOKENS as KeyboardTokens} from "../../keyboard/keyboardPlugin";
+
+function ActionInfo({actionId, x, y, info, hint, hotKey}) {
+  let visible = !!actionId;
+  
+  return <AuxWidget visible={visible} 
+    left={x} top={y} className={ls.root} zIndex={550}>
+    {visible && <Fragment>
+      <div className='hint'>{hint}</div>
+      <div className='info'>{info}</div>
+      {hotKey && <div className='hotKey'>hotkey: {hotKey}</div>}
+    </Fragment>}
+  </AuxWidget>;
+}
+
+export default connect([ACTION_TOKENS.HINT, KeyboardTokens.KEYMAP], ActionInfo, undefined, 
+  ([ hintInfo, keymap ]) => (Object.assign({hotKey: hintInfo && keymap[hintInfo.actionId]}, hintInfo)) ); 
+
diff --git a/web/app/cad/dom/actionInfo/ActionInfo.less b/web/app/cad/dom/actionInfo/ActionInfo.less
new file mode 100644
index 00000000..b86d86bc
--- /dev/null
+++ b/web/app/cad/dom/actionInfo/ActionInfo.less
@@ -0,0 +1,3 @@
+.root {
+  display: flex;
+}
\ No newline at end of file
diff --git a/web/app/cad/dom/actionInfo/actionInfoPlugin.js b/web/app/cad/dom/actionInfo/actionInfoPlugin.js
new file mode 100644
index 00000000..49f611b4
--- /dev/null
+++ b/web/app/cad/dom/actionInfo/actionInfoPlugin.js
@@ -0,0 +1,4 @@
+
+export function activate() {
+  
+}
\ No newline at end of file
diff --git a/web/app/cad/dom/components/ActionInfo.jsx b/web/app/cad/dom/components/ActionInfo.jsx
deleted file mode 100644
index 0095af65..00000000
--- a/web/app/cad/dom/components/ActionInfo.jsx
+++ /dev/null
@@ -1,12 +0,0 @@
-import React from 'react';
-
-
-
-export default function ActionInfo({children}) {
-
-  return <AuxWidget>
-    {children}    
-  </AuxWidget>;
-}
-
-
diff --git a/web/app/cad/dom/components/ControlBar.jsx b/web/app/cad/dom/components/ControlBar.jsx
index 0787b617..b7eefaba 100644
--- a/web/app/cad/dom/components/ControlBar.jsx
+++ b/web/app/cad/dom/components/ControlBar.jsx
@@ -15,9 +15,9 @@ export default function ControlBar({left, right}) {
   </div>
 }
 
-export function ControlBarButton({onClick, onElement, disabled, children}) {
+export function ControlBarButton({onElement, disabled, children, onClick, ...props}) {
   return <span className={cx(ls.button, 'disable-selection', {disabled})} 
-               onClick={disabled || onClick} ref={onElement}>
+               onClick={disabled || onClick} ref={onElement} {...props}>
     {children}
   </span>
 }
\ No newline at end of file
diff --git a/web/app/cad/dom/components/MessageSink.jsx b/web/app/cad/dom/components/MessageSink.jsx
deleted file mode 100644
index 324cdd0e..00000000
--- a/web/app/cad/dom/components/MessageSink.jsx
+++ /dev/null
@@ -1,11 +0,0 @@
-import React from 'react';
-
-import AuxWidget from './../../../../../modules/ui/components/AuxWidget';
-
-export default function MessageSink({children, ...props}) {
-
-  return <AuxWidget {...props}>
-    {children}    
-  </AuxWidget>;
-}
-
diff --git a/web/app/cad/dom/components/MessageSink.less b/web/app/cad/dom/components/MessageSink.less
deleted file mode 100644
index e69de29b..00000000
diff --git a/web/app/cad/dom/components/PlugableControlBar.jsx b/web/app/cad/dom/components/PlugableControlBar.jsx
index b64259a4..3a0550d0 100644
--- a/web/app/cad/dom/components/PlugableControlBar.jsx
+++ b/web/app/cad/dom/components/PlugableControlBar.jsx
@@ -5,6 +5,7 @@ import Fa from 'ui/components/Fa';
 import {TOKENS as UI_TOKENS} from '../uiEntryPointsPlugin';
 import {TOKENS as ACTION_TOKENS} from '../../actions/actionSystemPlugin';
 import {toIdAndOverrides} from "../../actions/actionRef";
+import {mapActionBehavior} from "../../actions/actionButtonBehavior";
 
 
 export default function PlugableControlBar() {
@@ -14,11 +15,10 @@ export default function PlugableControlBar() {
 function ButtonGroup({actions}) {
   return actions.map(actionRef => { 
     let [id, overrides] = toIdAndOverrides(actionRef);
-    let actionRunToken = ACTION_TOKENS.actionRun(id);
     let Comp = connect([ACTION_TOKENS.actionAppearance(id), ACTION_TOKENS.actionState(id)],
       ActionButton, {actionId: id},
       ([appearance, state]) => Object.assign({}, appearance, state, overrides),
-      dispatch => ({runAction: (data) => dispatch(actionRunToken, data)})
+      mapActionBehavior(id)
     );
     return <Comp key={id}/>;
   });
@@ -31,12 +31,16 @@ function isMenuAction(actionId) {
 class ActionButton extends React.Component {
   
   render() {
-    let {label, cssIcons, runAction, enabled, visible, actionId} = this.props;
+    let {label, cssIcons, enabled, visible, actionId, ...props} = this.props;
     if (!visible) {
       return null;
     }
-    const onClick = e => runAction(isMenuAction(actionId) ? getMenuData(this.el) : undefined);
-    return <ControlBarButton {...{onClick, disabled: !enabled}} onElement={el => this.el = el}>
+    if (isMenuAction(actionId)) {
+      let onClick = props.onClick;
+      props.onClick = e => onClick(getMenuData(this.el));
+    }
+    
+    return <ControlBarButton disabled={!enabled} onElement={el => this.el = el} {...props} >
       {cssIcons && <Fa fa={cssIcons} fw/>} {label}
     </ControlBarButton>;
   }
diff --git a/web/app/cad/dom/components/UISystem.jsx b/web/app/cad/dom/components/UISystem.jsx
index 92fa95cf..e6924dfd 100644
--- a/web/app/cad/dom/components/UISystem.jsx
+++ b/web/app/cad/dom/components/UISystem.jsx
@@ -4,15 +4,14 @@ import MenuHolder from "../menu/MenuHolder";
 import {TOKENS as MENU_TOKENS} from '../menu/menuPlugin';
 
 import WindowSystem from 'ui/WindowSystem';
-import MessageSink from './MessageSink';
-
+import ActionInfo from "../actionInfo/ActionInfo";
 
 export default class UISystem extends React.Component {
   
   render() {
     return <div {...this.props} onMouseDown={this.closeAllUpPopups}>
       <MenuHolder />
-      <MessageSink />
+      <ActionInfo />
       <WindowSystem />
       {this.props.children}
     </div>
diff --git a/web/app/cad/dom/components/View3d.jsx b/web/app/cad/dom/components/View3d.jsx
index a8348946..6499ee02 100644
--- a/web/app/cad/dom/components/View3d.jsx
+++ b/web/app/cad/dom/components/View3d.jsx
@@ -23,7 +23,6 @@ import NumberControl from "ui/components/controls/NumberControl";
 import ButtonGroup from "ui/components/controls/ButtonGroup";
 import Button from "ui/components/controls/Button";
 import TextControl from './../../../../../modules/ui/components/controls/TextControl';
-import MessageSink from './MessageSink';
 import UISystem from './UISystem';