Newbie: debug text?

Hello,

Is it a simple way to display on the screen the value
of a property in real time mode ?
(in the same way “debug statistics” are displayed)

Yes, there is a simple way:
In the game window click on the small ‘D’ (prints the debug info) to the right of a property and select ‘show debug properties’ in the game menu.

you can also show the framerate by going to the game menu selecting it.

Thanks for your anwsers people !