"Put those out" refers to the act of placing the menus on the table. "Those" refers to the plural menus. (If it was just one menu, it would instead say "it" or "that" instead.) In this case, the verb "to put out" would mean something like "to place" or "to give or distribute" or "to make available." So, another way to say "Have you put those out yet?" -- in the context of this sentence -- would be "Have you placed the menus out on the tables yet?"

Thank you ,Sir! I understand the difference between"yet " and " already". I just don't understand "PUT THOSE OUT " what does that mean ?

It is hard to understand the difference between already and yet. You should use "yet" with negative sentences and "already" with affirmative sentences. "I've already filled the sugar bowls," means that Francesca filled the bowls before the conversation. (Affirmative sentence) "I haven't put the menus on the tables yet," means that Francesca did not put the menus on the tables, but she will soon. (Negative sentence) I am happy to help if you still don't understand.