CODE EXAMPLE FOR HTML

zoom inkcanvas

<ScrollViewer x:Name="scrollViewer" ZoomMode="Enabled" MinZoomFactor="1" VerticalScrollMode="Enabled" VerticalScrollBarVisibility="Auto" HorizontalScrollMode="Enabled" HorizontalScrollBarVisibility="Auto">
  <Grid x:Name="outputGrid" Background="{ThemeResource SystemControlBackgroundChromeWhiteBrush}" Height="Auto">
    <InkCanvas x:Name="inkCanvas"/>
  </Grid>
</ScrollViewer>