Database compare is used frequently to make sure desired edits (and only desired edits) have been made to a layout database. It’s also used to make sure two layout files are identical (or not). As designs have increased in complexity over the years so have the available options for database comparison. Sometimes it’s unclear which tool to use for this frequently needed task. For those times where a simple, basic polygon comparison between two layout files is all you want and you’d like to quickly submit it from a command line, this video shows how to setup and use a simple script to run a Calibre DRC job to do that.