For american ones where you have a screen on the inside I have seen crank handles to push window out, or some have a tiny screen door in the screen you can open to reach the window latches, then close the tiny access door. It looks stupid, but it does work
I have screens on my 3rd floor windows. Mine are attached to the window frame with long thin velcro strips but I think there’s other systems as well.
Do you need to remove the screen if you want to open the window?
The screen is on the outside. The window opens to the inside. So no.
For american ones where you have a screen on the inside I have seen crank handles to push window out, or some have a tiny screen door in the screen you can open to reach the window latches, then close the tiny access door. It looks stupid, but it does work
I think those are casement windows which are similar I think but not the same as tilt and turn windows.