added layer namespace information

README.md

@@ -30,8 +30,9 @@ Sway is an incredible window manager, and certainly one of the most well establi
     - `shadows_on_csd enable|disable` (**Note**: The shadow might not fit some windows)
     - `shadow_blur_radius <integer value 0 - 100>`
     - `shadow_color <hex color with alpha> ex, #0000007F`
-+ LayerShell effects (to blur panels / notifications etc) :
++ LayerShell effects (to blur panels / notifications etc):
     - `layer_effects <layer namespace> <effects>`
+    - The current layer namespaces can be shown with `swaymsg -r -t get_outputs | jq '.[0].layer_shell_surfaces | .[] | .namespace'`
     - Example: `layer_effects "waybar" blur enable; shadows enable; corner_radius 6`
       - Note: If an application uses gtk, its namespace is likely to be "gtk-layer-shell"
     - SwayIPC Example: `swaymsg "layer_effects 'waybar' 'blur enable; shadows enable; corner_radius 6'"`