BinaryRibbonMenuItem

It is a WPF MenuItem: the text goes in HeaderedItemsControl.Header, and MenuItem.Click, MenuItem.Command, MenuItem.IsCheckable and MenuItem.IsChecked work as usual. Put it in a BinaryRibbonDropDownButton, a BinaryRibbonSplitButtonControl or a BinaryRibbonApplicationMenu; a click on it closes the drop-down button it is in.

Picture and check mark

Image is drawn 16 x 16 in a column to the left of the text, which is kept even when there is no picture so that the text of every entry lines up. A checked entry is drawn with a highlighted box behind its picture, or behind a tick when it has no picture.

Sub-menus

Entries in ItemsControl.Items make a sub-menu, opened from an arrow on the right of the entry and shown beside it. In a BinaryRibbonApplicationMenu the sub-menu fills the menu's right-hand pane instead, as Office's Save As and Print entries do.

Keyboard

A key tip (BinaryKeyTip.AccessKeyProperty) opens or closes the sub-menu of an entry that has one, and clicks an entry that has not.

A Print drop-down: a checkable option, and an entry with a sub-menu.

<ribbon:BinaryRibbonDropDownButton Content="Print" LargeImage="Images/Print32.png"
        xmlns:ribbon="clr-namespace:Binarymission.WPF.Controls.Office;assembly=Binarymission.WPF.Controls.BinaryRibbon">
    <ribbon:BinaryRibbonMenuItem Header="Print invoice"  Image="Images/Print16.png" Click="OnPrintInvoice"
                                 ribbon:BinaryKeyTip.AccessKey="P" />
    <ribbon:BinaryRibbonMenuItem Header="Include remittance slip" IsCheckable="True"
                                 IsChecked="{Binding IncludeRemittanceSlip}" />
    <ribbon:BinaryRibbonMenuItem Header="Print labels" Image="Images/Label16.png">
        <ribbon:BinaryRibbonMenuItem Header="Address label"  Click="OnPrintAddressLabel" />
        <ribbon:BinaryRibbonMenuItem Header="Parcel label"   Click="OnPrintParcelLabel" />
    </ribbon:BinaryRibbonMenuItem>
</ribbon:BinaryRibbonDropDownButton>