use behavior
MODIFY
WalletWasabi.Fluent/Views/MainWindow.axaml
WalletWasabi.Fluent/Views/MainWindow.axaml
<i:Interaction.Behaviors>
<behaviors:RegisterNotificationHostBehavior />
<behaviors:ShowWalletCoinsOnKeyCombinationBehavior Key1="LeftCtrl" Key2="D" Key3="C" />
+ <behaviors:WindowSizeBehavior />
</i:Interaction.Behaviors>
<Panel Margin="{Binding #MainWindow.OffScreenMargin}">

use behavior