Hello Philip,

The visibility of the scroll buttons is controlled with the ScrollButtonsVisibility parameter. It accepts one of the following available values: 

• GridToolBarScrollButtonsVisibility.Visible
• GridToolBarScrollButtonsVisibility.Hidden
• GridToolBarScrollButtonsVisibility.Auto

The demo you linked has a checkbox that allows the user to hide/show the scroll buttons, which is why it uses the Visible and Hidden values. However, if you want the buttons to show and hide automatically, you can set the parameter to Auto:

<GridSettings>
    <GridToolBarSettings OverflowMode="@GridToolBarOverflowMode.Scroll" 
        ScrollButtonsPosition="@ScrollButtonsLayout" 
        ScrollButtonsVisibility="GridToolBarScrollButtonsVisibility.Auto" 
        ShowInactiveTools="true">
    </GridToolBarSettings>
</GridSettings>

Here's a REPL example that demonstrates the effect of setting the parameter as shown above: https://blazorrepl.telerik.com/QTOqckvp35xpc8Rr04 

Declining this feature request, since the behavior is already customizable and with the setting mentioned above the scroll buttons of the Grid's toolbar hide and show (when needed) automatically, as in the TabStrip. 

Regards,
Ivan Danchev
Progress Telerik