hass-workstation-service/UserInterface/Views/GeneralSettings.axaml

<UserControl 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" d:DesignWidth="500" d:DesignHeight="450"
             x:Class="UserInterface.Views.GeneralSettingsView">
  <StackPanel Margin="30" HorizontalAlignment="Left">
    <ContentControl FontSize="18" FontWeight="Bold">Settings</ContentControl>
    <StackPanel Margin="0 20 0 10" HorizontalAlignment="Left" Orientation="Horizontal">
      <ContentControl>Name prefix</ContentControl>
      <TextBlock Cursor="Help" Margin="5 0 0 0" VerticalAlignment="Bottom" TextDecorations="Underline">(What's this?)
      <ToolTip.Tip>
        <StackPanel>
          <TextBlock>
[Experimental]
This allows you to set a name which will be used to prefix all sensor- and command names. For example:
If a sensor is called "ActiveWindow" and the name prefix is set to "laptop", the sensor will be named "laptop-ActiveWindow" and its entityId will be "laptop_activewindow".
          </TextBlock>
          
        </StackPanel>
      </ToolTip.Tip>
    </TextBlock>
     </StackPanel>
    <TextBox Text="{Binding NamePrefix}" HorizontalAlignment="Left" Width="100"/>
    <Button Width="75" HorizontalAlignment="Right" Margin="0 40 0 10" Click="Configure">Save</Button>
  </StackPanel>
</UserControl>