I just took a screenshot with my mac OS X?

now how do i find it /where and where do i edit aka resize it or edit
For I just took a screenshot with my mac OS X? try this:

• It's "Picture 1.pdf" on the desktop. You can double-click to open it with the Preview app, then pull down the File menu and use Export to save it as a JPEG or other kind of picture. From there you can use iPhoto or another photo editor to manipulate it.
  
• it should be on your desktop and if you have photoshop then open it there and edit it
  
  if it is on your desktop, it should be called "Picture 1"
  
  if it isnt on ur desktop, then go to the spotlight and look up "picture 1"
  
  hope I helped