SettingsWindow.axaml

<Window xmlns="https://github.com/avaloniaui"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
  mc:Ignorable="d" Width="300" Height="400"
  x:Class="Nema.SettingsWindow"
  Title="SettingsWindow">
  <StackPanel>
    <TextBlock>Emulation settings</TextBlock>
    <TextBlock>Wait time between commands</TextBlock>
    <NumericUpDown Value="{Binding EmulationSpeed}" Minimum="1" />
    <Button Command="{Binding _exit}">Save</Button>
  </StackPanel>
</Window>