Press and hold the SHARE button for at least 1 second.

Depending on the content or the state of the system, it might not be possible to take a screenshot.
To check screenshots that you have taken, select [Profile] from the function screen, and then select Capture icon (Captures).

Uploading a screenshot

Press the SHARE button, and then select [Upload Screenshot].
Select a screenshot.
Select an online service.
This screen is displayed only when there are multiple online services available.
Enter a comment, and then select [Upload].
The first time you connect to an online service, you must enter your account information for the online service. If you do not have an account, create one by visiting the online service's website.
Only 1 screenshot can be uploaded at a time.
Methods for deleting uploaded screenshots vary by online service. Refer to the website of the online service.

Sharing Screenshot
You can use Messages icon [ Register or Signin to view external links. ] (Messages) to send a screenshot to a Friend.