Press the Back/Menu button on your controller (or swipe down on screen) to bring up the menu.
Go to Settings > Graphics:
It started on a rainy Tuesday. A developer known only as ModderX posted a cryptic link on a forum. The title read: "GTA SA - PSP Edition - 500MB Highly Compressed - No Lag - All GPU Fixed."Relive the Legend: GTA San Andreas PPSSPP ISO