How to identify the concepts of lexical, syntactic and semantic level?

I'm trying to identify the lexical, syntactic and semantic concepts on this screen of the Waze application, but I don't know if I really understood these concepts.

Are buttons considered as lexical level?

Is the function that the button performs the syntactic level?

Is the general idea of the Waze app the semantic level?

Can anyone elaborate a little more on these concepts and say what each element of this screen represents and why?