Define org mode macro with line breaks

Question

It is possible to define a macro in an org file as follow:

#+MACRO: macroname 

Is it possi

Answer 1

The best advice I can give you is: follow what's suggested by Nicolas Goaziou (i.e., don't use macros for your usage), and find another solution for which you're sure it'll work now and forever.

In this case, I'd either use YASnippets (if just an helper when typing) or Org Babel (if it needs to be customized after having written your document).