diff --git a/react/features/base/toolbox/components/AbstractToolboxItem.js b/react/features/base/toolbox/components/AbstractToolboxItem.js
index 3e251728a..4da613261 100644
--- a/react/features/base/toolbox/components/AbstractToolboxItem.js
+++ b/react/features/base/toolbox/components/AbstractToolboxItem.js
@@ -9,6 +9,11 @@ export type Styles = {
      */
     iconStyle: Object,
 
+    /**
+     * Style for te item's label.
+     */
+    labelStyle: Object,
+
     /**
      * Style for the item itself.
      */
diff --git a/react/features/base/toolbox/components/ToolboxItem.native.js b/react/features/base/toolbox/components/ToolboxItem.native.js
index ed3ccd682..1262cfe33 100644
--- a/react/features/base/toolbox/components/ToolboxItem.native.js
+++ b/react/features/base/toolbox/components/ToolboxItem.native.js
@@ -1,7 +1,7 @@
 // @flow
 
 import React from 'react';
-import { TouchableHighlight } from 'react-native';
+import { Text, TouchableHighlight, View } from 'react-native';
 
 import { Icon } from '../../../base/font-icons';
 
@@ -26,9 +26,23 @@ export default class ToolboxItem extends AbstractToolboxItem<Props> {
     }
 
     /**
-     * Handles rendering of the actual item.
+     * Helper function to render the {@code Icon} part of this item.
      *
-     * TODO: currently no handling for labels is implemented.
+     * @private
+     * @returns {ReactElement}
+     */
+    _renderIcon() {
+        const { styles } = this.props;
+
+        return (
+            <Icon
+                name = { this._getIconName() }
+                style = { styles && styles.iconStyle } />
+        );
+    }
+
+    /**
+     * Handles rendering of the actual item.
      *
      * @protected
      * @returns {ReactElement}
@@ -38,19 +52,38 @@ export default class ToolboxItem extends AbstractToolboxItem<Props> {
             accessibilityLabel,
             disabled,
             onClick,
+            showLabel,
             styles
         } = this.props;
 
+        let children;
+
+        if (showLabel) {
+            // eslint-disable-next-line no-extra-parens
+            children = (
+                <View style = { styles && styles.style } >
+                    { this._renderIcon() }
+                    <Text style = { styles && styles.labelStyle } >
+                        { this.label }
+                    </Text>
+                </View>
+            );
+        } else {
+            children = this._renderIcon();
+        }
+
+        // When using a wrapper view, apply the style to it instead of
+        // applying it to the TouchableHighlight.
+        const style = showLabel ? undefined : styles && styles.style;
+
         return (
             <TouchableHighlight
                 accessibilityLabel = { accessibilityLabel }
                 disabled = { disabled }
                 onPress = { onClick }
-                style = { styles && styles.style }
+                style = { style }
                 underlayColor = { styles && styles.underlayColor } >
-                <Icon
-                    name = { this._getIconName() }
-                    style = { styles && styles.iconStyle } />
+                { children }
             </TouchableHighlight>
         );
     }
diff --git a/react/features/filmstrip/components/styles.js b/react/features/filmstrip/components/styles.js
index daa8f76ff..6d6fb68bc 100644
--- a/react/features/filmstrip/components/styles.js
+++ b/react/features/filmstrip/components/styles.js
@@ -55,8 +55,8 @@ export default {
         ...filmstrip,
         bottom: 0,
         flexDirection: 'column',
-        left: 0,
         position: 'absolute',
+        right: 0,
         top: 0
     },
 
diff --git a/react/features/toolbox/components/native/OverflowMenu.js b/react/features/toolbox/components/native/OverflowMenu.js
new file mode 100644
index 000000000..1f1d54892
--- /dev/null
+++ b/react/features/toolbox/components/native/OverflowMenu.js
@@ -0,0 +1,91 @@
+// @flow
+
+import React, { Component } from 'react';
+import { connect } from 'react-redux';
+
+import { hideDialog, BottomSheet } from '../../../base/dialog';
+import { AudioRouteButton } from '../../../mobile/audio-mode';
+import { PictureInPictureButton } from '../../../mobile/picture-in-picture';
+import { RoomLockButton } from '../../../room-lock';
+
+import AudioOnlyButton from './AudioOnlyButton';
+import ToggleCameraButton from './ToggleCameraButton';
+
+import { overflowMenuItemStyles } from './styles';
+
+type Props = {
+
+    /**
+     * Used for hiding the dialog when the selection was completed.
+     */
+    dispatch: Function,
+};
+
+/**
+ * The exported React {@code Component}. We need a reference to the wrapped
+ * component in order to be able to hide it using the dialog hiding logic.
+ */
+
+// eslint-disable-next-line prefer-const
+let OverflowMenu_;
+
+/**
+ * Implements a React {@code Component} with some extra actions in addition to
+ * those in the toolbar.
+ */
+class OverflowMenu extends Component<Props> {
+    /**
+     * Initializes a new {@code OverflowMenu} instance.
+     *
+     * @inheritdoc
+     */
+    constructor(props: Props) {
+        super(props);
+
+        this._onCancel = this._onCancel.bind(this);
+    }
+
+    /**
+     * Implements React's {@link Component#render()}.
+     *
+     * @inheritdoc
+     * @returns {ReactElement}
+     */
+    render() {
+        return (
+            <BottomSheet onCancel = { this._onCancel }>
+                <AudioRouteButton
+                    showLabel = { true }
+                    styles = { overflowMenuItemStyles } />
+                <ToggleCameraButton
+                    showLabel = { true }
+                    styles = { overflowMenuItemStyles } />
+                <AudioOnlyButton
+                    showLabel = { true }
+                    styles = { overflowMenuItemStyles } />
+                <RoomLockButton
+                    showLabel = { true }
+                    styles = { overflowMenuItemStyles } />
+                <PictureInPictureButton
+                    showLabel = { true }
+                    styles = { overflowMenuItemStyles } />
+            </BottomSheet>
+        );
+    }
+
+    _onCancel: () => void;
+
+    /**
+     * Hides the dialog.
+     *
+     * @private
+     * @returns {void}
+     */
+    _onCancel() {
+        this.props.dispatch(hideDialog(OverflowMenu_));
+    }
+}
+
+OverflowMenu_ = connect()(OverflowMenu);
+
+export default OverflowMenu_;
diff --git a/react/features/toolbox/components/native/OverflowMenuButton.js b/react/features/toolbox/components/native/OverflowMenuButton.js
new file mode 100644
index 000000000..985ec2abb
--- /dev/null
+++ b/react/features/toolbox/components/native/OverflowMenuButton.js
@@ -0,0 +1,39 @@
+// @flow
+
+import { connect } from 'react-redux';
+
+import { openDialog } from '../../../base/dialog';
+import { translate } from '../../../base/i18n';
+import { AbstractButton } from '../../../base/toolbox';
+import type { AbstractButtonProps } from '../../../base/toolbox';
+
+import OverflowMenu from './OverflowMenu';
+
+type Props = AbstractButtonProps & {
+
+    /**
+     * The redux {@code dispatch} function.
+     */
+    dispatch: Function
+}
+
+/**
+ * An implementation of a button for showing the {@code OverflowMenu}.
+ */
+class OverflowMenuButton extends AbstractButton<Props, *> {
+    accessibilityLabel = 'Overflow menu';
+    iconName = 'icon-thumb-menu';
+    label = 'toolbar.moreActions';
+
+    /**
+     * Handles clicking / pressing the button.
+     *
+     * @private
+     * @returns {void}
+     */
+    _handleClick() {
+        this.props.dispatch(openDialog(OverflowMenu));
+    }
+}
+
+export default translate(connect()(OverflowMenuButton));
diff --git a/react/features/toolbox/components/native/ToolbarButton.js b/react/features/toolbox/components/native/ToolbarButton.js
deleted file mode 100644
index ccb03c419..000000000
--- a/react/features/toolbox/components/native/ToolbarButton.js
+++ /dev/null
@@ -1,62 +0,0 @@
-import PropTypes from 'prop-types';
-import React from 'react';
-import { TouchableHighlight } from 'react-native';
-import { connect } from 'react-redux';
-
-import { Icon } from '../../../base/font-icons';
-
-import AbstractToolbarButton from '../AbstractToolbarButton';
-
-/**
- * Represents a button in {@link Toolbar} on React Native.
- *
- * @extends AbstractToolbarButton
- */
-class ToolbarButton extends AbstractToolbarButton {
-    /**
-     * {@code ToolbarButton} component's property types.
-     *
-     * @static
-     */
-    static propTypes = {
-        ...AbstractToolbarButton.propTypes,
-
-        /**
-         * Indicates whether this {@code ToolbarButton} is disabled.
-         */
-        disabled: PropTypes.bool
-    };
-
-    /**
-     * Renders the button of this {@code ToolbarButton}.
-     *
-     * @param {Object} children - The children, if any, to be rendered inside
-     * the button. Presumably, contains the icon of this {@code ToolbarButton}.
-     * @protected
-     * @returns {ReactElement} The button of this {@code ToolbarButton}.
-     */
-    _renderButton(children) {
-        const props = {};
-
-        'accessibilityLabel' in this.props
-            && (props.accessibilityLabel = this.props.accessibilityLabel);
-        'disabled' in this.props && (props.disabled = this.props.disabled);
-        'onClick' in this.props && (props.onPress = this._onClick);
-        'style' in this.props && (props.style = this.props.style);
-        'underlayColor' in this.props
-            && (props.underlayColor = this.props.underlayColor);
-
-        return React.createElement(TouchableHighlight, props, children);
-    }
-
-    /**
-     * Renders the icon of this {@code ToolbarButton}.
-     *
-     * @inheritdoc
-     */
-    _renderIcon() {
-        return super._renderIcon(Icon);
-    }
-}
-
-export default connect()(ToolbarButton);
diff --git a/react/features/toolbox/components/native/Toolbox.js b/react/features/toolbox/components/native/Toolbox.js
index a6709dd4b..ed60956aa 100644
--- a/react/features/toolbox/components/native/Toolbox.js
+++ b/react/features/toolbox/components/native/Toolbox.js
@@ -9,52 +9,28 @@ import {
     isNarrowAspectRatio,
     makeAspectRatioAware
 } from '../../../base/responsive-ui';
-import { ColorPalette } from '../../../base/styles';
 import { InviteButton } from '../../../invite';
-import { AudioRouteButton } from '../../../mobile/audio-mode';
-import { PictureInPictureButton } from '../../../mobile/picture-in-picture';
-import { RoomLockButton } from '../../../room-lock';
 
 import AudioMuteButton from '../AudioMuteButton';
-import AudioOnlyButton from './AudioOnlyButton';
 import HangupButton from '../HangupButton';
-import styles from './styles';
-import ToggleCameraButton from './ToggleCameraButton';
 import VideoMuteButton from '../VideoMuteButton';
 
-/**
- * Styles for the hangup button.
- */
-const hangupButtonStyles = {
-    iconStyle: styles.whitePrimaryToolbarButtonIcon,
-    style: styles.hangup,
-    underlayColor: ColorPalette.buttonUnderlay
-};
+import OverflowMenuButton from './OverflowMenuButton';
+import styles, {
+    hangupButtonStyles,
+    toolbarButtonStyles,
+    toolbarToggledButtonStyles
+} from './styles';
 
 /**
- * Styles for buttons in the primary toolbar.
+ * Number of buttons in the toolbar.
  */
-const primaryToolbarButtonStyles = {
-    iconStyle: styles.primaryToolbarButtonIcon,
-    style: styles.primaryToolbarButton
-};
+const NUM_TOOLBAR_BUTTONS = 4;
 
 /**
- * Styles for buttons in the primary toolbar.
+ * Factor relating the hangup button and other toolbar buttons.
  */
-const primaryToolbarToggledButtonStyles = {
-    iconStyle: styles.whitePrimaryToolbarButtonIcon,
-    style: styles.whitePrimaryToolbarButton
-};
-
-/**
- * Styles for buttons in the secondary toolbar.
- */
-const secondaryToolbarButtonStyles = {
-    iconStyle: styles.secondaryToolbarButtonIcon,
-    style: styles.secondaryToolbarButton,
-    underlayColor: 'transparent'
-};
+const TOOLBAR_BUTTON_SIZE_FACTOR = 0.8;
 
 /**
  * The type of {@link Toolbox}'s React {@code Component} props.
@@ -62,20 +38,85 @@ const secondaryToolbarButtonStyles = {
 type Props = {
 
     /**
-     * The indicator which determines whether the toolbox is enabled.
+     * The indicator which determines whether the toolbox is visible.
      */
-    _enabled: boolean,
+    _visible: boolean,
 
     /**
-     * Flag showing whether toolbar is visible.
+     * The redux {@code dispatch} function.
      */
-    _visible: boolean
+    dispatch: Function
+};
+
+/**
+ * The type of {@link Toolbox}'s React {@code Component} state.
+ */
+type State = {
+
+    /**
+     * The detected width for this component.
+     */
+    width: number
 };
 
 /**
  * Implements the conference toolbox on React Native.
  */
-class Toolbox extends Component<Props> {
+class Toolbox extends Component<Props, State> {
+    state = {
+        width: 0
+    };
+
+    /**
+     *  Initializes a new {@code Toolbox} instance.
+     *
+     * @inheritdoc
+     */
+    constructor(props: Props) {
+        super(props);
+
+        this._onLayout = this._onLayout.bind(this);
+    }
+
+    _onLayout: (Object) => void;
+
+    /**
+     * Handles the "on layout" View's event and stores the width as state.
+     *
+     * @param {Object} event - The "on layout" event object/structure passed
+     * by react-native.
+     * @private
+     * @returns {void}
+     */
+    _onLayout({ nativeEvent: { layout: { width } } }) {
+        this.setState({ width });
+    }
+
+    /**
+     * Calculates how large our toolbar buttons can be, given the available
+     * width. In the future we might want to have a size threshold, and once
+     * it's passed a completely different style could be used, akin to the web.
+     *
+     * @private
+     * @returns {number}
+     */
+    _calculateToolbarButtonSize() {
+        const width = this.state.width;
+        const hangupButtonSize = styles.hangupButton.width;
+
+        let buttonSize
+            = (width - hangupButtonSize
+                - (NUM_TOOLBAR_BUTTONS * styles.toolbarButton.margin * 2))
+                    / NUM_TOOLBAR_BUTTONS;
+
+        // Make sure it's an even number.
+        buttonSize = 2 * Math.round(buttonSize / 2);
+
+        // The button should be at most 80% of the hangup button's size.
+        return Math.min(
+            buttonSize, hangupButtonSize * TOOLBAR_BUTTON_SIZE_FACTOR);
+    }
+
     /**
      * Implements React's {@link Component#render()}.
      *
@@ -83,84 +124,54 @@ class Toolbox extends Component<Props> {
      * @returns {ReactElement}
      */
     render() {
-        if (!this.props._enabled) {
-            return null;
-        }
-
         const toolboxStyle
             = isNarrowAspectRatio(this)
                 ? styles.toolboxNarrow
                 : styles.toolboxWide;
+        const { _visible } = this.props;
+        const buttonStyles = {
+            ...toolbarButtonStyles
+        };
+        const toggledButtonStyles = {
+            ...toolbarToggledButtonStyles
+        };
+
+        if (_visible && this.state.width) {
+            const buttonSize = this._calculateToolbarButtonSize();
+            const extraStyle = {
+                borderRadius: buttonSize / 2,
+                height: buttonSize,
+                width: buttonSize
+            };
+
+            buttonStyles.style = [ buttonStyles.style, extraStyle ];
+            toggledButtonStyles.style
+                = [ toggledButtonStyles.style, extraStyle ];
+        }
 
         return (
             <Container
+                onLayout = { this._onLayout }
                 style = { toolboxStyle }
-                visible = { this.props._visible } >
-                { this._renderToolbars() }
+                visible = { _visible } >
+                <View
+                    pointerEvents = 'box-none'
+                    style = { styles.toolbar }>
+                    <InviteButton styles = { buttonStyles } />
+                    <AudioMuteButton
+                        styles = { buttonStyles }
+                        toggledStyles = { toggledButtonStyles } />
+                    <HangupButton styles = { hangupButtonStyles } />
+                    <VideoMuteButton
+                        styles = { buttonStyles }
+                        toggledStyles = { toggledButtonStyles } />
+                    <OverflowMenuButton
+                        styles = { buttonStyles }
+                        toggledStyles = { toggledButtonStyles } />
+                </View>
             </Container>
         );
     }
-
-    /**
-     * Renders the toolbar which contains the primary buttons such as hangup,
-     * audio and video mute.
-     *
-     * @private
-     * @returns {ReactElement}
-     */
-    _renderPrimaryToolbar() {
-        return (
-            <View
-                key = 'primaryToolbar'
-                pointerEvents = 'box-none'
-                style = { styles.primaryToolbar }>
-                <AudioMuteButton
-                    styles = { primaryToolbarButtonStyles }
-                    toggledStyles = { primaryToolbarToggledButtonStyles } />
-                <HangupButton styles = { hangupButtonStyles } />
-                <VideoMuteButton
-                    styles = { primaryToolbarButtonStyles }
-                    toggledStyles = { primaryToolbarToggledButtonStyles } />
-            </View>
-        );
-    }
-
-    /**
-     * Renders the toolbar which contains the secondary buttons such as toggle
-     * camera facing mode.
-     *
-     * @private
-     * @returns {ReactElement}
-     */
-    _renderSecondaryToolbar() {
-        return (
-            <View
-                key = 'secondaryToolbar'
-                pointerEvents = 'box-none'
-                style = { styles.secondaryToolbar }>
-                <AudioRouteButton styles = { secondaryToolbarButtonStyles } />
-                <ToggleCameraButton styles = { secondaryToolbarButtonStyles } />
-                <AudioOnlyButton styles = { secondaryToolbarButtonStyles } />
-                <RoomLockButton styles = { secondaryToolbarButtonStyles } />
-                <InviteButton styles = { secondaryToolbarButtonStyles } />
-                <PictureInPictureButton
-                    styles = { secondaryToolbarButtonStyles } />
-            </View>
-        );
-    }
-
-    /**
-     * Renders the primary and the secondary toolbars.
-     *
-     * @private
-     * @returns {[ReactElement, ReactElement]}
-     */
-    _renderToolbars() {
-        return [
-            this._renderSecondaryToolbar(),
-            this._renderPrimaryToolbar()
-        ];
-    }
 }
 
 /**
@@ -179,21 +190,7 @@ function _mapStateToProps(state: Object): Object {
     const { enabled, visible } = state['features/toolbox'];
 
     return {
-        /**
-         * The indicator which determines whether the toolbox is enabled.
-         *
-         * @private
-         * @type {boolean}
-         */
-        _enabled: enabled,
-
-        /**
-         * Flag showing whether toolbox is visible.
-         *
-         * @protected
-         * @type {boolean}
-         */
-        _visible: visible
+        _visible: enabled && visible
     };
 }
 
diff --git a/react/features/toolbox/components/native/index.js b/react/features/toolbox/components/native/index.js
index 118cf0179..70fb4807a 100644
--- a/react/features/toolbox/components/native/index.js
+++ b/react/features/toolbox/components/native/index.js
@@ -1,2 +1 @@
-export { default as ToolbarButton } from './ToolbarButton';
 export { default as Toolbox } from './Toolbox';
diff --git a/react/features/toolbox/components/native/styles.js b/react/features/toolbox/components/native/styles.js
index d38529b77..c52f95b23 100644
--- a/react/features/toolbox/components/native/styles.js
+++ b/react/features/toolbox/components/native/styles.js
@@ -1,152 +1,83 @@
 import { BoxModel, ColorPalette, createStyleSheet } from '../../../base/styles';
 
 /**
- * The base style for toolbars.
- *
- * @type {Object}
+ * The style of toolbar buttons.
  */
-const _toolbar = {
-    flex: 0,
-    position: 'absolute'
-};
-
-/**
- * The base style of toolbar buttons (in primaryToolbar and secondaryToolbar).
- *
- * @type {Object}
- */
-const _toolbarButton = {
-    flex: 0,
-    justifyContent: 'center',
-    opacity: 0.7
-};
-
-/**
- * The base icon style of toolbar buttons (in primaryToolbar and
- * secondaryToolbar).
- *
- * @type {Object}
- */
-const _toolbarButtonIcon = {
-    alignSelf: 'center'
-};
-
-/**
- * The style of toolbar buttons in primaryToolbar.
- */
-const primaryToolbarButton = {
-    ..._toolbarButton,
+const toolbarButton = {
     backgroundColor: ColorPalette.white,
-    borderRadius: 30,
+    borderRadius: 20,
     borderWidth: 0,
+    flex: 0,
     flexDirection: 'row',
-    height: 60,
+    height: 40,
+    justifyContent: 'center',
     margin: BoxModel.margin,
-    width: 60
+    marginBottom: BoxModel.margin / 2,
+    opacity: 0.7,
+    width: 40
 };
 
 /**
- * The icon style of the toolbar buttons in primaryToolbar.
- *
- * @type {Object}
+ * The icon style of the toolbar buttons.
  */
-const primaryToolbarButtonIcon = {
-    ..._toolbarButtonIcon,
+const toolbarButtonIcon = {
+    alignSelf: 'center',
     color: ColorPalette.darkGrey,
-    fontSize: 24
+    fontSize: 22
 };
 
 /**
- * The icon style of the toolbar buttons in secondaryToolbar.
- *
- * @type {Object}
+ * The Toolbox and toolbar related styles.
  */
-const secondaryToolbarButtonIcon = {
-    ..._toolbarButtonIcon,
-    color: ColorPalette.white,
-    fontSize: 18
-};
-
-/**
- * The (conference) Toolbox/Toolbar related styles.
- */
-export default createStyleSheet({
+const styles = createStyleSheet({
     /**
-     * The style of the toolbar button in {@link #primaryToolbar} which
-     * hangs the current conference up.
+     * The style of the toolbar button which hangs the current conference up.
      */
-    hangup: {
-        ...primaryToolbarButton,
-        backgroundColor: ColorPalette.red
+    hangupButton: {
+        ...toolbarButton,
+        backgroundColor: ColorPalette.red,
+        borderRadius: 30,
+        height: 60,
+        width: 60
     },
 
     /**
-     * The icon style of toolbar buttons in {@link #primaryToolbar} which
-     * hangs the current conference up.
+     * The icon style of toolbar buttons which hangs the current conference up.
      */
     hangupButtonIcon: {
-        ...primaryToolbarButtonIcon,
-        color: ColorPalette.white
+        ...toolbarButtonIcon,
+        color: ColorPalette.white,
+        fontSize: 24
     },
 
     /**
-     * The style of the toolbar which contains the primary buttons such as
-     * hangup, audio and video mute.
+     * The style of the toolbar.
      */
-    primaryToolbar: {
-        ..._toolbar,
+    toolbar: {
+        alignItems: 'center',
         bottom: 0,
+        flex: 0,
         flexDirection: 'row',
         justifyContent: 'center',
         left: 0,
+        position: 'absolute',
         right: 0
     },
 
     /**
-     * The style of toolbar buttons in {@link #primaryToolbar}.
+     * The style of toolbar buttons.
      */
-    primaryToolbarButton,
+    toolbarButton,
 
     /**
-     * The icon style of the toolbar buttons in {@link #primaryToolbar}.
+     * The icon style of the toolbar buttons.
      */
-    primaryToolbarButtonIcon,
+    toolbarButtonIcon,
 
     /**
-     * The style of the toolbar which contains the secondary buttons such as
-     * toggle camera facing mode.
-     */
-    secondaryToolbar: {
-        ..._toolbar,
-        bottom: 0,
-        flexDirection: 'column',
-        right: 0,
-        top: 0
-    },
-
-    /**
-     * The style of toolbar buttons in {@link #secondaryToolbar}.
-     */
-    secondaryToolbarButton: {
-        ..._toolbarButton,
-        backgroundColor: ColorPalette.darkGrey,
-        borderRadius: 20,
-        flexDirection: 'column',
-        height: 40,
-        margin: BoxModel.margin / 2,
-        width: 40
-    },
-
-    /**
-     * The icon style of the toolbar buttons in {@link #secondaryToolbar}.
-     */
-    secondaryToolbarButtonIcon,
-
-    /**
-     * The style of the root/top-level {@link Container} of {@link Toolbox}
-     * which contains {@link Toolbar}s. This is narrow layout version which
-     * spans from the top of the screen to the top of the filmstrip located at
-     * the bottom of the screen.
+     * The style of the root/top-level {@link Container} of {@link Toolbox}.
+     * This is the narrow layout version which locates the toolbar on top of
+     * the filmstrip, at the bottom of the screen.
      */
     toolboxNarrow: {
         flexDirection: 'column',
@@ -154,11 +85,9 @@ export default createStyleSheet({
     },
 
     /**
-     * The style of the root/top-level {@link Container} of {@link Toolbox}
-     * which contains {@link Toolbar}s. This is wide layout version which spans
-     * from the top to the bottom of the screen and is located to the right of
-     * the filmstrip which is displayed as a column on the left side of the
-     * screen.
+     * The style of the root/top-level {@link Container} of {@link Toolbox}.
+     * This is the wide layout version which locates the toolbar at the bottom
+     * of the screen.
      */
     toolboxWide: {
         bottom: 0,
@@ -169,20 +98,89 @@ export default createStyleSheet({
     },
 
     /**
-     * The style of toolbar buttons in {@link #primaryToolbar} which display
-     * white icons.
+     * The style of toolbar buttons which display white icons.
      */
-    whitePrimaryToolbarButton: {
-        ...primaryToolbarButton,
+    whiteToolbarButton: {
+        ...toolbarButton,
         backgroundColor: ColorPalette.buttonUnderlay
     },
 
     /**
-     * The icon style of toolbar buttons in {@link #primaryToolbar} which
-     * display white icons.
+     * The icon style of toolbar buttons which display white icons.
      */
-    whitePrimaryToolbarButtonIcon: {
-        ...primaryToolbarButtonIcon,
+    whiteToolbarButtonIcon: {
+        ...toolbarButtonIcon,
         color: ColorPalette.white
     }
 });
+
+export default styles;
+
+/**
+ * Styles for the hangup button.
+ */
+export const hangupButtonStyles = {
+    iconStyle: styles.whiteToolbarButtonIcon,
+    style: styles.hangupButton,
+    underlayColor: ColorPalette.buttonUnderlay
+};
+
+/**
+ * Styles for buttons in the toolbar.
+ */
+export const toolbarButtonStyles = {
+    iconStyle: styles.toolbarButtonIcon,
+    style: styles.toolbarButton
+};
+
+/**
+ * Styles for toggled buttons in the toolbar.
+ */
+export const toolbarToggledButtonStyles = {
+    iconStyle: styles.whiteToolbarButtonIcon,
+    style: styles.whiteToolbarButton
+};
+
+/**
+ * Styles for the {@code OverflowMenu} items.
+ *
+ * These have been implemented as per the Material Design guidelines:
+ * {@link https://material.io/guidelines/components/bottom-sheets.html}.
+ */
+const overflowMenuStyles = createStyleSheet({
+    /**
+     * Container style for a {@code ToolboxItem} rendered in the
+     * {@code OverflowMenu}.
+     */
+    container: {
+        alignItems: 'center',
+        flexDirection: 'row',
+        height: 48
+    },
+
+    /**
+     * Style for the {@code Icon} element in a {@code ToolboxItem} rendered in
+     * the {@code OverflowMenu}.
+     */
+    icon: {
+        fontSize: 24
+    },
+
+    /**
+     * Style for the label in a {@code ToolboxItem} rendered in the
+     * {@code OverflowMenu}.
+     */
+    label: {
+        flex: 1,
+        fontSize: 16,
+        marginLeft: 32,
+        opacity: 0.87
+    }
+});
+
+export const overflowMenuItemStyles = {
+    iconStyle: overflowMenuStyles.icon,
+    labelStyle: overflowMenuStyles.label,
+    style: overflowMenuStyles.container,
+    underlayColor: '#eee'
+};