The release notes are installed by default in the directory /usr/local/lib/xictools/xic/docs, and Xic searches this directory
for the notes. Xic can be directed to look in a different
directory in two ways. First, the environment variable XIC_DOCS_DIR can be set to the directory to search. Second, the
variable DocsDir can be set (with the !set command) to the
directory to search. The release notes describe bugs fixed and new
features added to Xic, and should be read after a new release is
installed. Also, they serve as supplements to the manual between
printings. By policy, all updated information contained in the
release note is incorporated into the help database for a given
release.