Suppose I have 40 nets.
20 of them are in Net Class A
and
20 of them are in Net Class B
Then I want 1mm spacing between Net Class A and Net Class B.
This is possible using net-net class found in design rule settings.
But when I have done this, I cannot change the nets inside the net class anymore inside Net Rule.
For example, in Net Class A, I want to have the net pwr-230vac to have 4mm spacing.
But I cannot do this when I already have this net inside the net class at net-net design rules.
See image below, the option to change the net rule is 'greyed out'.
![image.png](//image.easyeda.com/pullimage/Ttbkb7ruZQ35JIZgmea0jNDsl96Q9xuOyB2fl6fi.png)
Is there an option to resolve this?