VIAs clearance

[CPU_6502]

Hi!

How can I set the size of the VIAs spacing (clearance) of a NET before starting autotrace?

[alamanna]

Hi,
here are the links to a couple of documents that you might hopefully find useful.

NI Ultiboard Basics: PCB Layout Course
http://www.ni.com/white-paper/52160/en/ 

Best Practices in PCB Design: Finalizing for Fabrication in Ultiboard
http://www.ni.com/tutorial/8583/en/ 

(You are interested in Ultiboard, aren't you?)
Regards,
Alessia