== Functionality related ==
=== Fit mode ===
If you are using the standard app without XAML customizings, the [[UBIK_WinX_Client_Basics#Fit_Mode|fit mode]] feature should work out of the box.
However, when using a FlipView for displaying documents in your customized XAMLs, you must make sure to include the following binding to the FlipView's ItemTemplate so that the fit modes are properly applied.
<source lang = "xml">
<DataTemplate
...
xmlns:hs="using:UBIK.WinX.HotSpotting.Document">
...
<Grid.Resources>
...
<DataTemplate>
...
<hs:Document
...
FitMode="{Binding DocumentViewModel.FitMode}" />
</DataTemplate>
</Grid.Resources>
</DataTemplate>
</source>
== Performance related ==
=== FlipView ===
When using the FlipView control in your XAML code, it's better to enable [https://docs.microsoft.com/en-us/windows/uwp/debug-test-perf/optimize-gridview-and-listview#ui-virtualization UI virtualization]. The difference in performance gets more obvious as the number of items in the FlipView increases. Here's how to enable it.