Button inside of a picture

-Create a new module row
-Click the orange cog and set the background image to the picture you want to put there
-Now drop your button from the elements onto the new module and use the “style” to move it wherever you need to.
Let me know if this works for you.

Thanks for helping other users @ricolfrico!

PS: Live Composer plugin developers provide support only via this form: https://livecomposerplugin.com/support/support-request/