An item button redirect users to a specified item. It is defined using the <OpenItem> tag. This article provides a configuration example of item links on a custom ribbon tab.
Prerequisites
The below example includes shortcuts on a custom tab ("ASPICE") to 4 specific items.
Example Configuration
<ItemRibbonTabConfig>
<Contexts>
<Context caption="Process" color="blue"/>
</Contexts>
<ItemTabs>
<ItemTab caption="ASPICE" context="Process">
<RibbonGroups>
<RibbonGroup caption="Process Fulfillment Areas">
<OpenItem id="x0400000000005164"/>
<OpenItem id="x040000000000B9C7"/>
<OpenItem id="x040000000000557A"/>
<OpenItem id="x0400000000005580"/>
</RibbonGroup>
</RibbonGroups>
</ItemTab>
</ItemTabs>
</ItemRibbonTabConfig>Example Result

When users click on an item button, the item will load.
