I have a ApplicationMenu2010Item just for occupy some space. But it looks it will show KeyTip 'I' by default. Even it is disabled. It looks like:
My code is:
<igRibbon:ApplicationMenu2010Item x:Uid="igRibbon:ApplicationMenu2010blank" IsEnabled="False" KeyTip="" Height="50"></igRibbon:ApplicationMenu2010Item>
Hello Shengjie,
You can use an ApplicationMenu2010Separator instead of ApplicationMenu2010Item.https://es.infragistics.com/help/wpf/infragisticswpf.ribbon~infragistics.windows.ribbon.applicationmenu2010separator
The sample code that using an ApplicationMenu2010Separator and hiding a border is
<igRibbon:ApplicationMenu2010Separator Height="100" Visibility="Hidden" />
Please test this on your side and let me know if you need any further assistance with this matter.