Any text in your macro that starts with the pound symbol is ignored and treated as a comment:

# Let's insert a footnote!

Insert:Footnote

The pound symbol does not need to be the first character on the line:

Insert:Footnote # also inserts a footnote

As of Pro v2.1 multi-line comments can be marked by using the /* */ characters. The prefix /* marks the start of the comment, which does not end until the suffix */ is encountered:

Bold

  /* A multi-line comment starts on this line,

  and keeps going ...

  until it reaches the terminal suffix */

Italic

Multi-line comments are only recognized if the /* prefix is the first non-whitespace character sequence on a line. Likewise the */ suffix must be the last non-whitespace character sequence on the terminal line.