Windowed application

I have an application that I just want to work with windowed. But press the fullsize button, the application is fullscreen. I don’t want to have fullscreen. my settings are as follows :

Fullscreen Mode = Windowed
Default Screen With = 1920
Default Screen Heigth = 1080

Someone answered this here: https://forum.unity.com/threads/playersettings-are-ignored-when-building-windowed-fullscreen.257700/