Mouse Scrolling without raising window in XFCE 4/Xubuntu
By default, when scrolling with the mouse wheel on a window that's on the background, that window is raised becoming the top window. To prevent the window from raising, open a terminal window and run: xfconf-query -c xfwm4 -p /general/raise_with_any_button -s false The same result can also be accomplished with "Settings Editor" (xfce4-settings-editor), selecting the xfwm4 channel and unpicking the raise_with_any_button value.