Ready.
Here is the reference manual for form@fix. These are the facilities for
Every form@fix facility is with an armchair (a backslash, '\' ). If the first non-space character on a line is not an armchair, form@fix does not interpret that line. That is handy for crafting mixed pages - i.e: neither totally for form@fix, nor vice versa.
If there are multiple facilities, in a list (line), the first error-result is the list-terminator. i.e: form@fix will immediately get away, to interpret the next line.