Created attachment 960 [details]
sample

Related post :
http://support.steema.com/viewtopic.php?f=4&t=17492&sid=ab43c8c37b85b8f48aefaa218bc86c14

I got it to render, albeit incorrectly, by subclassing it and invoking the draw call to it. The DrawText method is NOT being called otherwise, for whatever reason.

Edit: AutoSize was being changed for some reason, somewhere. The sizing is ok.

This is a workaround:
[code]


	public class AnnotationTool : Annotation
	{
		public AnnotationTool( Chart chart, string text ) : this(chart) => Text = text;
		public AnnotationTool( Chart chart ) : base(chart)
		{
			Active = true;
			Position = AnnotationPositions.Custom;
			TextAlign = TextAlignment.Start;
			AutoSize = true;
			AllowEdit = false;
		}

		public Rectangle GetBounds()
		{
			 // forces a refresh.
			AutoSize = true;
			return Bounds;
		}


		public void Draw( Graphics3D g ) { DrawText(g); }
	}
	
	
	// In the graphing page, attach to the AfterDraw event
	private void TChart1_Annotations_AfterDraw( object sender, Graphics3D g )
	{
		/// ...
		AnnotationTool.Draw(g);
		/// ...
	}

[/code]