This page covers the process for creating a custom near-human species, as described on page 17 of the The Unknown Regions SWSE rulebook.
A near-human species uses the Human traits as a baseline (Medium size, base speed of 6 squares, one bonus feat, one bonus trained skill), with the following modifications:
Players generating a near-human species for their player character can choose whichever traits and variants they prefer. If the goal is to create a randomized near-human species, such as for an NPC, the traits and variants can be randomized by rolling d20s and d8s.