Adding a additional mouse movewindow Kbd Modifier to SUPER

I am trying to add an additional keyboard modifier to allow a simple left button mouse window move/drag to avoid using the default SUPER key in certain scenarios.

Problem to solve: I use a large VNC window and have conflicting actions I try to separate.

I tried to add the line below to hyprland.conf, but nothing happens.

bind = SUPER SHIFT, mouse:272, movewindow

You need bindm
bindm = SUPER SHIFT, mouse:272, movewindow