Because I experiment with CF settings, I need easily to check critical CF-values before every diving. For me they are GF low and high, last deco stop etc.
I imagine that this values could be present on custom line. I see three solutions:
1) Custom line with special chars represent CF values, for example %32 (or $32 or #32...) means 'value of CF32'; in this case definition for my custom line will be:
GF=%32,%33 LD=%29
with result:
GF=20,80 LD=6
2) Predefined sets of CF's (prepared by HW team) and selected by user through new CF value (0 - user text, 1 - first set, 2 - second set, etc.)
3) Hmm ... the sum of first and second solution

Sorry for my bad english.
Regards
Jacek