How to use M117 to show message during bed leveling manual Gcode for Ender 3

Hello
I have a Creality Ender 3, I used Repetiere-Host to write a G code that help me to leveling the bed.
In particular The G code command improved, is NOT G42 Mesh based. I use G0 because of I prefer to level the 4 corner, then leveling the bed's center.
Why, when I place the stop feature: "M0 S60 next corner" On the display appear only: "waiting for user"?
I tried to place in the pause g code the M117 Next corner but It doesn't work.
Can you help me?

Thank you

Pause is funnily enough a blocking command. No other command are processed until the time has elapsed or the button is pressed. This is what is is designed to do....