1> Start Jpcsp, -> Options -> Configuration -> DIsplay [Check the Box that says Start JPCSP in Full-Screen Exclusive Mode in the following runs. , Resolution should be set to Native]
2> Close then re-open Jpcsp it should be full screen now, Right click on the middle of the screen -> File -> Load UMD (load your game), Right click again and click run.
If you load the game through the Launcher then you wont need to load UMD / press run, it should just start up.
Btw not every game is compatible with full-screen mode some might have glitches, if this is the case try to toggle the Only GE option
2> Close then re-open Jpcsp it should be full screen now, Right click on the middle of the screen -> File -> Load UMD (load your game), Right click again and click run.
If you load the game through the Launcher then you wont need to load UMD / press run, it should just start up.
Btw not every game is compatible with full-screen mode some might have glitches, if this is the case try to toggle the Only GE option
Try Out JPCSP Launcher v1.8.0.4 | How to post a log