What is the standard/recommended way for an app to display indicators that are media related like paused or muted etc? These could be buttons I suppose, I can a back button on a sample here that is a white circle with left arrow - how is this image being associated with the button?
<Button x:Name="backButton" Margin="39,59,39,0" Command="{Binding NavigationHelper.GoBackCommand, ElementName=pageRoot}" Style="{StaticResource NavigationBackButtonNormalStyle}" VerticalAlignment="Top" AutomationProperties.Name="Back" AutomationProperties.AutomationId="BackButton" AutomationProperties.ItemType="Navigation Button"/>No image is specified here...