I’ve been looking for it in both global shortcuts type : ‘move window’ but that was all and I need ‘move window to another desktop’ or what’s the shortcut for this purpose
If you ask such a question, you should always mention which desktop you use.
In KDE4 there is no shortcut set by default. But you can set one to move a window to a particular desktop, or to the next/previous desktop.
Just select component “KWin” in “Configure Desktop”->“Shortcuts and Gestures”->“Global Shortcut”:
http://wstaw.org/m/2015/07/09/shortcuts.png
For Plasma5 it should be the same.
PS: There’s also “Window One Desktop Up”, “Window One Desktop Down”, “Window One Desktop To The Left”, and “Window One Desktop To The Right”, if you prefer that.
thanks wolfi