Junos CLI how to edit 'destination address' in firewall rule

Hey folks

Very new to Junos here and I am struggling to find how I edit the 'Destination Address' in a pre-existing rule.

I have been able to view the security policy for the rule in question, but that is it. I have been googling away and I can't find anything along the lines of - edit security policy policy number etc etc.

Any help would be massively appreciated

Vince