Menu buttons accessibility tab doc update

src/pages/components/menu-buttons/accessibility.mdx

@@ -10,22 +10,16 @@ import A11yStatus from 'components/A11yStatus';
 
 <PageDescription>
 
-No accessibility annotations are needed for overflow menus, but keep these
-considerations in mind if you are modifying Carbon or creating a custom
-component.
+Design annotations are needed for specific instances shown below, but for the
+standard menu button, combo button, and overflow menu, Carbon already
+incorporates accessibility.
 
 </PageDescription>
 
-<InlineNotification>
-
-**Coming soon!** The accessibility information for the menu button and combo
-button is going to be updated soon.
-
-</InlineNotification>
-
 <AnchorLinks>
 
 <AnchorLink>What Carbon provides</AnchorLink>
+<AnchorLink>Design recommendations</AnchorLink>
 <AnchorLink>Development considerations</AnchorLink>
 
 </AnchorLinks>
@@ -40,11 +34,83 @@ accessibility considerations, some of which are described below.
 
 ### Keyboard interaction
 
+#### Menu button
+
+The menu button is set in the tab order and is activated by `Space` or `Enter`.
+When the menu is open, the first item takes focus. Focus is moved between menu
+items with the `Up` and `Down` arrow keys. `Space` or `Enter` activates the item
+with focus, which causes focus to go somewhere else and the menu to close. `Esc`
+collapses the menu and puts focus back onto the menu button.
+
+<Row>
+<Column colLg={8}>
+
+![example of menu button keyboard interaction](images/menu-button-accessibility-1.png)
+
+<Caption>
+  Menu button is reached by Tab. Space and Enter keys open the menu as well as
+  activating menu items with focus.
+</Caption>
+
+</Column>
+</Row>
+
+<Row>
+<Column colLg={8}>
+
+![illustration showing an open menu with the focus on the first item, and the arrow and Esc keys called out](images/menu-button-accessibility-2.png)
+
+<Caption>
+  When opened, the first item in the menu takes focus. Arrow keys move focus and
+  Esc closes the menu.
+</Caption>
+
+</Column>
+</Row>
+
+#### Combo button
+
+The combo button is set in the tab order where the first tab brings focus on the
+primary button and the second tab brings focus on the icon button that contains
+the menu. The respective buttons are activated by `Space` or `Enter`. When the
+menu is open, the first item takes focus. Focus is moved between menu items with
+the `Up` and `Down` arrow keys. `Space` or `Enter` activates the item with
+focus, which causes focus to go somewhere else and the menu to close. `Esc`
+collapses the menu and puts focus back onto the icon button.
+
+<Row>
+<Column colLg={8}>
+
+![example of combo button keyboard interaction](images/combo-button-accessibility-1.png)
+
+<Caption>
+  Combo button items are reached by two Tab stops. Space and Enter keys open the
+  menu as well as activating menu items with focus.
+</Caption>
+
+</Column>
+</Row>
+
+<Row>
+<Column colLg={8}>
+
+![illustration showing an open menu with the focus on the first item, and the arrow and Esc keys called out](images/combo-button-accessibility-2.png)
+
+<Caption>
+  When opened, the first item in the menu takes focus. Arrow keys move focus and
+  Esc closes the menu.
+</Caption>
+
+</Column>
+</Row>
+
+#### Overflow menu
+
 Each overflow menu is in the tab order and is activated by `Space` or `Enter`.
 When the menu is open, the first item takes focus. Focus is moved between menu
 items with the `Up` and `Down` arrow keys. `Space` or `Enter` activates the item
-with focus (which causes focus to go somewhere else and the menu to close).
-`Esc` collapses the menu and puts focus onto the menu button.
+with focus, which causes focus to go somewhere else and the menu to close. `Esc`
+collapses the menu and puts focus onto the menu button.
 
 <Row>
 <Column colLg={8}>
@@ -65,22 +131,81 @@ with focus (which causes focus to go somewhere else and the menu to close).
 ![illustration showing an open menu with the focus on the first item, and the arrow and Esc keys called out](images/overflow-menu-accessibility-2.png)
 
 <Caption>
-  When opened, the first item in the menu takes focus. Arrow keys move focus,
+  When opened, the first item in the menu takes focus. Arrow keys move focus and
   Esc closes the menu.
 </Caption>
 
 </Column>
 </Row>
 
+## Design recommendations
+
+Design annotations are needed for the following instances.
+
+### Labeling
+
+#### Combo button
+
+Combo button has a prop that can be used to change the tooltip label and is only
+intended to be changed to translate _'Additional actions'_ into other languages.
+If translation is required, the translation must be annotated with a label that
+is exposed on hover or focus.
+
+<Row>
+<Column colLg={8}>
+
+![a combo button which is a part of a translated page that has an annotation 'label=अतिरिक्त कार्रवाइयां'](images/combo-button-accessibility-3.png)
+
+<Caption>
+  Annotate the label for combo button so the proper tooltip appears, which
+  should only be used for translation purposes.
+</Caption>
+
+</Column>
+</Row>
+
+#### Overflow menu
+
+Overflow menu’s
+[custom icon variant](https://react.carbondesignsystem.com/?path=/story/components-overflowmenu--render-custom-icon)
+has a prop that can be used to change the tooltip label. If the tooltip label is
+changed, they must be annotated with a label that will be exposed on hover or
+focus.
+
+<Row>
+<Column colLg={8}>
+
+![a custom icon over flow menu with a share icon that has an annotation 'label=sharing options'](images/overflow-menu-accessibility-3.png)
+
+<Caption>
+  Annotate the label for overflow menu’s custom icon variant so the proper
+  tooltip appears.
+</Caption>
+
+</Column>
+</Row>
+
 ## Development considerations
 
 Keep these considerations in mind if you are modifying Carbon or creating a
 custom component.
 
-- Overflow menus are buttons with `aria-haspopup` set to "true".
-- The overflow menu is named with `aria-label`.
-- Each menu item is an `li` in a `ul`.
-- Each list item contains a button with `role="menuitem"` and `tabindex="-1"`.
-  See the
+- Menu button, combo button, and the overflow menu are buttons with
+  `aria-haspopup` set to "true".
+- The menu button, combo button, and the overflow menu is named with
+  `aria-label`.
+- Each menu item across menu button, combo button, and overflow menu is an `li`
+  in a `ul`.
+- Each list item across menu button, combo button, and overflow menu contains a
+  button with `role="menuitem"` and `tabindex="-1"`. See the
   [ARIA authoring practices on menubutton](https://w3c.github.io/aria-practices/#menubutton)
   for more considerations.
+- Combo button and overflow menu has an `iconDescription` prop that can be used
+  to change the tooltip label. See the
+  [design recommendations](#design-recommendations) for more guidelines on
+  tooltip labels.
+- For combo button, the menu is given an `id`. When the menu is open, the icon
+  button is given `aria-controls` with a value of the menu `id`. `aria-expanded`
+  is also set based on the open state.
+- When the combo button menu is open, the element (`div`) wrapping the entire
+  Combo button is given `aria-owns` with a value of the Menu `id`.

src/pages/components/menu-buttons/usage.mdx

@@ -102,19 +102,19 @@ avoids cluttering the main interface with too many options.
 
 #### 1. Menu button
 
-A. Primary button <br /> C. Menu <br />
+A. Primary button <br /> B. Menu <br />
 
 #### 2. Combo button
 
-A. Primary button <br /> B. Icon button <br /> C. Menu <br />
+A. Primary button <br /> B. Menu <br /> C. Icon button <br />
 
 </Column>
 
 <Column colSm={2} colMd={4} colLg={4}>
 
 #### 3. Overflow menu
 
-A. Icon button <br /> C. Menu <br />
+A. Icon button <br /> B. Menu <br />
 
 </Column>
 </Row>

src/pages/components/toggle/usage.mdx

@@ -52,7 +52,7 @@ Toggle is a control that is used to quickly switch between two possible states.
 Toggles are only used for these binary actions that occur immediately after the
 user “flips the switch”. They are commonly used for “on/off” switches.
 
-## Variants
+### Variants
 
 | Variant                           | Purpose                                                                                                                                                                  |
 | --------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |