The epistack package main objective is the visualizations of stacks of genomic tracks (such as, but not restricted to, ChIP-seq, ATAC-seq, DNA methyation or genomic conservation data) centered at genomic regions of interest. epistack needs three different inputs: 1) a genomic score objects, such as ChIP-seq coverage or DNA methylation values, provided as a GRanges (easily obtained from bigwig or bam files). 2) a list of feature of interest, such as peaks or transcription start sites, provided as a GRanges (easily obtained from gtf or bed files). 3) a score to sort the features, such as peak height or gene expression value.