I am new to Raspberry Pi, and have just downloaded PINN, which I've read is an enhanced version of NOOBS. I was hoping that I could switch between LibreELEC and Raspbian whenever I booted up the Pi, but as soon as I turn it on, it automatically boots to Raspbian within a few seconds. I want to be able to switch between the 2 often, whilst also keeping the data. Any ideas on how to do this. Btw, I downloaded both of them at the start, but I'm stuck on Raspbian.