Hello, I have a question, I used to plot my genomic data with GenomeGraphs where I used trackOverlay to add a Segmentation track to a BaseTrack to create something like this: Can Gviz do something like this also, I did not find any straightforward method in the available documentation, maybe using the segmentation as another sample could work (but then it would be plotted with the same type and would have to have the same coordinates, right?) Could someone hint me towards an approach to create a plot like that with Gviz? Cheers, Paul