In a listing, GN4 can display a tool tip if you hover with a mouse above an item. The tool tip is defined on the directory style level, thus it can be different for every directory style.

Fig 1: Image preview tool tip

Fig 2: Image caption tool tip

At the moment, you cannot turn off the automatic tool tips over the content (where provided).

Image tool tips are configured within <Image.ToolTip> statement, within ImagePicker base query in Ted4_CONFIG.XML.

<Image.ToolTip>

  <StackPanel Orientation="Vertical" Width="300" Height="300">

    <TextBlock Height="Auto" HorizontalAlignment="Left" Text="{Binding Path=[img.name]}" />

    <TextBlock Height="Auto" HorizontalAlignment="Left" Text="{Binding Path=[img.folderRef:DescName]}" />

    <Image MaxWidth="280" MaxHeight="280" HorizontalAlignment="Center" VerticalAlignment="Center" Stretch="Uniform" Source="{Binding Path=[img.preview], IsAsync=true, Converter={StaticResource IdToImageConverter}}"/>

  </StackPanel>

</Image.ToolTip>

You can vary the panel size (red color), and image preview size (blue color).