@ddw_music Ok thank you. However I'm still a bit confused.
What do I need to write in the receive box in the properties of my canvas in order to
change the colour of the label
change what the label says
change the colour of the canvas itself
all at the same time

For context this is so that the background and the label of a button change colour when a key is pressed

I am making a digital MIDI instrument with pd. I have constructed buttons from Canvas objects that change either the colour or the label when you click them. However, I would like to be able to change both the colour and the label simultaneously.

Is there a way for a canvas object to receive multiple messages at once in the "receive symbol" box?