Hi,

I've three track to plot using gviz. One annotatioTrack, one GeneRegionTrack, and one an AlignmentsTrack (coverage from a bam file) . But the coverage track takes a significant height of the total plot. How can I tune this in order to have something more visual.

Here's the plot :

From ? plotTracks:

   sizes: A numeric vector of relative vertical sizes for the

          individual tracks of length equal to the number of tracks in

          'trackList', or 'NULL' to auto-detect the most appropriate

          vertical size proportions.

So in your case, something like

plotTracks(list(track1, track2, track3), sizes=c(5,1,5))