You can use Aspect="Fill", then give the ImageButton a HeightRequest="60" WidthRequest="100", Here is code.

 <StackLayout HorizontalOptions="Center"  VerticalOptions="Start">

   <ImageButton  Source="Test.png"  Aspect="Fill"  HeightRequest="60" WidthRequest="100" />
 </StackLayout>

Here is running screenshot.

@betcss

There are various ways of doing this. The simplest is just to check whether the page is already open, and not to open it again if so. That's a solution that has appeared many times in the forum previously. See https://forums.xamarin.com/discussion/comment/210530/#Comment_210530

SKCanvas.DrawText method doesn't convert the symbol automatically. To achieve this, you can divide the string into multiple parts and draw multiple times.

SkiaSharp provides the SKCanvas.RotateDegrees method to rotate the content.

canvas.RotateDegrees(90,float_1,float_2);
canvas.DrawText(str_1);

canvas.RotateDegrees(-90);
canvas.DrawText(str_2);
...

Here are code for broadcast receiver for system alarm event: `ALARMMANAGER_TRIGGERED

 [BroadcastReceiver]
 [IntentFilter (new[] { AlarmReceiver.ALARM_TRIGGER })]
 public class AlarmReceiver : BroadcastReceiver
 {
  public const string ALARM_TRIGGER = "ALARM_TRIGGERED";

  public override void OnReceive(Context context, Intent intent) 
  {

    Intent startIntent = new Intent(context, typeof(AlarmIntentService));
    context.StartService(startIntent);
  }
  }

Code for broadcast receiver for system boot-completed event:

   [BroadcastReceiver]
   [IntentFilter(new[] { Android.Content.Intent.ActionBootCompleted } )]
   public class BootReceiver : BroadcastReceiver
   {
      public override void OnReceive (Context context, Intent intent)
   {

        Intent startIntent = new Intent (context, typeof(BootIntentService));
        context.StartService (startIntent);
   }
   }

Add to AndroidManifest.xml:

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

If you use Xamarin forms, you can use DependencyService to register BroadcastReceiver.
Create a interface.

    public  interface IBroadcast
{
    void GetAlarmReceiver();
}

We can trigger it with Xamarin.Forms.DependencyService.Get<IBroadcast>().GetAlarmReceiver();

Achieve it in Droid folder.

[assembly: Xamarin.Forms.Dependency(typeof(MyAlarm))]
namespace ScanDemo.Droid
 {

    public class MyAlarm : IBroadcast
  {
    public void GetAlarmReceiver()
    {
        IntentFilter filter = new IntentFilter();
        filter.AddAction(AlarmReceiver.ALARM_TRIGGER);


        AlarmReceiver receiver = new AlarmReceiver();
        Application.Context.RegisterReceiver(receiver, filter);
     }
   }

Get SKBitmap first ,and convert to SKImage , same code works fine on my side,check https://github.com/xamarin/xamarin-forms-samples/blob/ab589e1c26a3b5a85c7235fa5bddb9ff0570944e/SkiaSharpForms/Demos/Demos/SkiaSharpFormsDemos/Basics/BasicBitmapsPage.cs#L37.

    string resourceID = "SkiaSharpFormsDemos.Media.monkey.png";
        Assembly assembly = GetType().GetTypeInfo().Assembly;

        using (Stream stream = assembly.GetManifestResourceStream(resourceID))
        {
            resourceBitmap = SKBitmap.Decode(stream);

            var s = SKImage.FromBitmap(resourceBitmap);
        }

Please ensure the path for the image is seekable , refer the similar thread : https://forums.xamarin.com/discussion/102129/creating-skimage-from-resources-within-forms

iOS Effect

    protected override void OnAttached ()
    {
        try {

            string title = (Control as UIButton).CurrentTitle.ToUpper();

            (Control as UIButton).SetTitle(title, UIControlState.Normal);

        } catch (Exception ex) {

        }
    }

UWP Effect

    protected override void OnAttached()
    {
        try
        {
            var button = Control as Windows.UI.Xaml.Controls.Button;

            var title = (button.Content as string).ToUpper();

            button.Content = title;
        }
        catch (Exception ex)
        {

        }
    }

We could use skiasharp to draw a dotted line. I drew it in a list view and here is the code.
Xaml:

<StackLayout>
    <ListView ItemsSource="{Binding Items}">
        <ListView.ItemTemplate>
            <DataTemplate>
                <ViewCell>
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="10"/>
                            <ColumnDefinition Width="*"/>
                        </Grid.ColumnDefinitions>
                        <Label Text="Left"/>
                        <skiaforms:SKCanvasView Grid.Column="1" PaintSurface="OnCanvasViewPaintSurface" />
                        <Label Text="Right" Grid.Column="2"/>
                    </Grid>
                </ViewCell>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>
</StackLayout>

Code behind:

private void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{

    SKImageInfo info = args.Info;
    SKSurface surface = args.Surface;
    SKCanvas canvas = surface.Canvas;

    canvas.Clear();

    SKPaint paint = new SKPaint
    {
        Style = SKPaintStyle.Stroke,
        Color = SKColors.Blue,
        StrokeWidth = 5,
        StrokeCap = SKStrokeCap.Butt,
        PathEffect = SKPathEffect.CreateDash(new float[] { 5, 5 }, 20)
    };

    SKPath path = new SKPath();
    path.MoveTo(0.5f * info.Width, 0);
    path.LineTo(0.5f * info.Width, info.Height);

    canvas.DrawPath(path, paint);
}

Effect:

Another approach is to use a dotted line image. Use an Image control to display it in your list view.