The variable ECF_MICRO can be set to change the ecFlow micro-character. This affects both the commands and the interpretation of the ecFlow files. The default value is "%".
An example showing changing the micro-character follows:
suite x
edit ECF_MICRO "&"
family f
task t
File t.ECF
&include <head.h>
echo job here
&include <end.h>
Another way of changing the micro-character is to set it up in the ecFlow script. It only effects the script interpretation not the commands ECF_JOB_CMD or ECF_KILL_CMD.