Create Sign Style
Sign Style SignPortals can go to ANY Multiverse destination .
Step 1
Give yourself multiverse.signportal.create
Step 2
Place A sign. Type text in the same format as this (make sure [mv] is on the second line of the sign and world is on the third): 
Step 3
If your [mv] turns green, your SignPortal is ready to use. If it turns red , re-read step 1 and do that. 
•Invalid SignPortal
Did your SignPortal turn RED?

I was creating a new SignPortal and it turned red
Make sure you have multiverse.signportal.create
I was trying to validate a Legacy SignPortal and it turned red
Make sure you have multiverse.signportal.validate