DEFormats is distributed through the Bioconductor package repository. To install the package, start R and enter:
if (!requireNamespace("BiocManager", quietly=TRUE))
install.packages("BiocManager")
BiocManager::install("DEFormats")
For an overview of the package functionality see the vignette.
Once you install the package, you can access individual man pages by a call to, e.g., ?DEFormats.
Bug reports, feature requests, or any other issues with the package should be reported at https://github.com/aoles/DEFormats/issues.