Hi Philip,
In PB 2019 R2 Build 2353, the RibbonMenu object of the RibbonBar supports this functionality. You can define the corresponding XML as below (add '&' to the front of the specified character):
<Item Text="Cl&ose" PictureName="CloseBig!" Checked="false" Enabled="true" Tag="Close" Type="0" Visible="true" Clicked="ue_appmastermenu" Selected="ue_MenuCloseSelected" />
However, for other objects in RibbonBar control, like LargeButton, SmallButton, etc. they are not supported.
But if you configure the Shortcut property of these objects, if the mouse hovers over these objects, the corresponding shortcut info will be displayed.
Regards,