Hi,

By default Gviz's plotTracks function adds a box to the left of the gene model:

For example, following Gviz's online tutorial:

require(Gviz)
data(geneModels)
gen <- "hg19"
chr <- "chr7"

gtrack <- GenomeAxisTrack()
itrack <- IdeogramTrack(genome = gen, chromosome = chr)
grtrack <- GeneRegionTrack(geneModels,genome=gen,chromosome=chr,name="Gene Model")

produces a gray box to the left of the transcript tracks. 

My questions is if it is possible to eliminate this box from the figure?

Specifying name="" instead of name="Gene Model" doesn't seem to work and I couldn't find any of the displayPars(grtrack) that suppresses this box.

Sorry,

I didn't notice this can be set by the panel.only=T arg