QT Creator Cross Compilation

Hello everybody
I am having a hard time trying to understand how to setting QT creator for cross-compiling my application that will run on a Pixhawk 4 Mini.

My desktop operating system is Ubuntu 16.04
QT creator 3.5.1 based on QT 5.5.1
Target device: Pixhawk 4 Mini (I don have the board yet)

I followed the toolchain installation (Linux · PX4 Developer Guide) but when I go to the QT creator I cannot find any information about the device target in the “devices” options.
Do I need to have the board connected to the desktop in order to set up the QT creator for the cross-compilation?
Any comments will be very welcomed.

Thanks in advance.