How To Use The DualSense Touchpad On A PS Portal
Briefly

The PlayStation Portal, an 8-inch handheld device, maintains the familiar feel of the DualSense controller despite the absence of a physical touchpad.
To use touchpad controls on PlayStation Portal, simply tap the screen to bring up two on-screen pads, mimicking the original DualSense touchpad functionality.
Double tapping the on-screen pads simulates a click on the touchpad, allowing access to in-game menus and maps, albeit a bit clunky.
The PlayStation Portal's controller buttons operate like the standard DualSense, ensuring a smooth gaming experience outside of the new touchpad implementation.
Read at Kotaku
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