How to highlight specific portion of the gene and its isoform using ggbio

Question

[camillab.]

Hi guys,

I would like to use ggbio to see the different isoforms for a specific gene. I am able to get the isoforms but I cannot find which genome browser the package is using (eg.Ensemble?). In addition I would like to highlight a specific area/region across all isoforms, is it possible to do it in R/with this package or is it easy to just modify the image myself with another program?

thank you!

Camilla