... Some of these commands are L A T E X macros, while oth­ ers belong to plain T E X; no attempt to differen­ tiate them is made. ``/ --- ordinary space after period. ``! --- negative thin space = \Gamma 1 6 quad; xx``!x yields xxx (math mode). ``'' makes an umlaut, as Ёo. ``# prints a pound sign: #. ``$ prints a dollar sign: $. ``% prints a percent sign: %. ``& prints an ampersand: &. ``' in tabbing environment moves current column to the right of the previous column. ... math mode). ``phi is OE. ...