implemented in https://github.com/swaywm/sway/pull/2352
# Drag floating windows by holding down $mod and left mouse button.
# Resize them with right mouse button + $mod.
- floating_modifier $mod
+ # Despite the name, also works for non-floating windows.
+ # Change normal to inverse to use left mouse button for resizing and right
+ # mouse button for dragging.
+ floating_modifier $mod normal
# reload the configuration file
bindsym $mod+Shift+c reload