...For each host, it also shows the groups, host variables, custom variables and machine-local facts. Some templates, such as txt_table and html_fancy, support columns. If a template supports columns, you can use the --columns / -c command-line option to specify which columns to show. The --columns take a comma-separated list of columns (no spaces!) which should be shown. The columns must be specified by their id field. For information on what id fields are supported by a template, take a look in the template. Usually, it's the column title, but in lowercase and with spaces replaced by underscores.