... There are two separate ways to specify special characters to SM, by using a syntax very similar to TeX (the type-setting system created by Donald Knuth that we used for this manual), or the traditional Mongo way. ... Using TeX-style strings is strongly recommended by the authors; all future and most recent improvements to SM's labels are only supported in TeX mode. ... The font changes persist until the end of the string, or the current group, whichever comes first. ... Draw a bar over str . ...