hey the link doesnt work
go to appearance → menus
at the top right click "screen options"
then activate "css classes"
then edit your menu point and add the css class "laybutton1"
now the button 1 style is applied to that menu point
not sure if that works well
you can also add a class "mybutton" instead
and then in lay options → custom css & html
in the css write your css to create the button style
at the moment you cant add icons to the menu. maybe you can find a plugin for this?