From MusiCAD

Macros are placeholders for text that should not be hard-coded yet, This way you can use one text on several places.

Macros are primarily used in the header and footer dialog

$A Arranger
$B Current filename.
$C Composer.
$c Comment text
$D Last modification date
$d Creation date .
$E Original author (MusiCAD ID)
$e Installation directory
$F Second subtitle.
$G Information
$I Instrument-name, (* only in single part view )
$H Country.
$J Year
$K Number of parts in score.
$L License (registration name).
$M MusiCAD.
$m Mode
$N Number of pages.
$P Part name; (* only in single part view ).
$Q MusiCAD version number
$R Copyright text.
$S Subtitle
$T Title.
$U Number of repeats
$v Play order
$V Todays's date.
$W Lyricist
$X Tuning for transposing instruments (C, Bb, Eb Alt etc.)
$x Opus number, tracking.
$Y Style
$y Part-number (* only in single part view )
$Z Source.
$z Area; further specification of source
$# Page-number.
$? Current time.
$@ Starting tempo.
$> Skip rest of line if number of pages is smaller than 2.
$< Skip rest of line of first page.
$1 Skip rest of line on odd pages.
$2 Skip rest of line on even pages.
$_ Conditional space.
$, Conditional comma.
$. Conditional dot.
$: Conditional colon.
$+ Conditional plus.
$- Conditional minus.

Apart from the one-letter macro's it is possible to use a few directories from windows that tend to be language specific and windows-version-specific and even user specific. The actual values are to be found under [Help|Info|Directories] and will be used for default preferences in file locations

$(PERSONAL) C:\My Documents
$(MYMUSIC) C:\My Documents\My music
$(MYPICTURES) C:\My Documents\My pictures