ESP32 PSRAM

I am using ESP32 to interface a display, wifi, and BLE. In this interface. I want to move my few functions like BLE, Wifi, and display to the external RAM (PSRAM). So I just want simple and clear examples of how to utilize the PSRAM, the necessary settings I would require to do in the SDK config of Arduino to use the PSRAM, and how to free the space used for the PSRAM functions.