There is no need to "save" your image. Whatever adjustments you made are always there, but you can step back in history, or reset to the original (pre adjustments) if desired.
You can export if you want to product a copy in a different format ie jpg, or resolution etc.
|Meet at HKCC Rain or Shine by pen araneae|
from Your City - Rain Down on Me
|Pregnancy Is Beautiful by sye46|
from Women's World
|Criss-Cross Traffic by PEB|
from Best Use of Motion
|Picking a Star in the Milky Way by vbuhay|
from My Best Photo of the Week