Some question on Orcad PCB editor (from an Orcad layout user)

[maccumba]

Hi all ,
for first, if someone have used Orcad Layout too there is a significant
improvement in upgrading to PCB editor ?

On PCB Editor:

- In Layout The spacing violation control (Design Rule Check)signal like
errors the simple hole too and i don't know how exclude the holes
from DRC , In PCB Editor the situation is better then layout ?

- Spacing from Nets : can i set (for a single net) a minimum spacing
from a group of nets and another spacing from a
different grouping nets ?

- Mills or notches : in Layout i need to make some notches on the PCB
for isolation , in layout the only way is a lot of consecutive holes
(for now i don't know a better way...and this create the problem with
DRC ) , what is the way to describe a mill/notch in PCB Editor ??

Allegro PCB Designer is the same or there is difference ?

Thanks in advance.

Andrea