`+$ tt out [<category_id>]+`
+==== to
+
+Punches the category out, if exactly one is in.
+Then punches in the new category in its place.
+
+`+$ tt to <category_id>+`
+
`+category_id+` is optional if there is only one category currently punched in.
==== pop
==== list
+Lists the current state of each category.
+
+`+$ tt list`
+
+==== print
+
Lists each category (or just the category specified) and current state of
that category.
-`+$ tt list [category_id]+`
+`+$ tt print [category_id]+`
==== daemon | service