Used Xfce for a decade. I have never had trouble using the mouse to resize windows. I use 1080p screen, maybe you use a higher resolution and 1px is too small o

Used Xfce for a decade. I have never had trouble using the mouse to resize windows. I use 1080p screen, maybe you use a higher resolution and 1px is too small on that. If you right click the title bar of any window, to open a menu, from which you can select resize.