Hello,

trying to offset the background image of a diagram so its raster fits to nodes spacing:

<Presentation:DetailDiagram x:Name="NetDiagram" BackgroundImage="{StaticResource Cell_Grid}"
BackgroundImageAlign="Tile"

Focusable="False"
ShowAnchors="Auto"
BackBrush="{StaticResource DefaultBackgroundBrush}"
AlignToGrid="True"
GridSizeX="1"
GridSizeY="1"
ShapeHandlesStyle="HatchHandles3"
ShowGrid="False"
Behavior="DrawLinks"
ShapeBrush="DeepSkyBlue"
AllowDrop="True"
>

but there is no margin="" element to nudge the positioning of the background a bit, like 20 pixels...

repositionining the nodes themselves gets overriden, as somehow the backgroundimage "adapts" and jumps to same position again..

You can draw an image with offset from the DrawBackground event handler:

private void OnDrawBackground(object sender, DiagramEventArgs e)
{
	var img = Utilities.LoadImage("test.png");
	var rect = new Rect(160, 20, img.Width, img.Height);
	e.Graphics.DrawImage(img, rect);
} 

I hope that helps,
Stoyan