Default WBS Mask in Project Server 2013

Hello guys,

Anyone knows how to set up a default wbs mask in project server?

I want to that every project created in our server should use the same WBS Mask, for example:

PHS1.SWK.001

Using the Define WBS button I'm able to define a mask like ***.***.111 but I can't find in any place in Project Server how to make this the default mask.

I'm an administrator in our Project Server.

Any help is welcome.

Tahnks!