Firstly I have very little experience in R (I am a wet lab person); so if this is not the correct forum for this question please ignore it. I am using Gviz to plot transcripts from 5 different tissues. I have independent gtf files for each of the five tissues . Now, I want to highlight the transcripts which are present only in one tissue. Can it be possible to do with Gviz ? Or the community member is having any other suggestion?