Opening a annotate_ym node has no context back to the node

When opening an annotation the related node is not shown in the view.

It would be nifty to show the context of the annotation say 5 lines before and 5 lines after the marking set.

Ie when marking line 12 to 14 display the referenced node lines 7 to 19.

An annotate_ym node could be annotated too.