SAS Enterprise Guide 8.1 (EG) does not display the autocomplete list for snippets within a macro definition (i.e., between %MACRO and %MEND keywords.
EG does display the autocomplete for the snippet outside of the macro definition. EG also displays the autocomplete list for macro variables within the macro
I have included screenshots below for the macro %ThisMacro and the snippet _Boo
%macro ThisMacro(
Var=/*boo*/
);
%mend;
Outside of the macro definition the autocomplete menu appears for snippet _Boo
Inside the macro definition, the autocomplete menu for macro variables appears
But inside the macro definition, the autocomplete menu for snippets does not appear