When you read in the torah, for every person called up you must read three pesukim, sentences. In times past they used to have a translator, translating the pesukim. The reader should not read more then one posuk at a time to be translated. When reading the navi you can read three posukim and then translate. If the three pesukim are in different paragraphs then you should only do translation by each posuk.

You can skip pesukim in neviim by rolling the scroll while the translator is translating.

Megila 4:5

Since maftir is the least important reading [aliyah] as it is repeating some of the last aliyah, we give him the zechus of being the leader of the Pores al shema, repeating the Shimone Esrei, if he is a cohein in a shul of all cohanim he makes the bracha. If the maftir was done by a child, the zechus of maftir goes to his father or Rebbe.