PF How to delete one rule in PF ?


From pfctl man page i know how to flush and disable/enable pf. But how can i remove from CLI only one rule, without full flushing and reload config file ?

For example, i add on-the-fly command for port forwarding:

echo 'rdr pass proto tcp from any to any port 37 ->' | pfctl -f -

And want to remove only this rule. It is possible ?
You can use "-T" to add or remove entries from tables. If you wanted to disable a rule applied to this table you could remove all of the entries. If you want some sort of command to "toggle" a port opening or closing I'd think it would be much easier to write a script to modify pf.conf and reload the rules.