any comp[uter literate people know how....

to change the format of correcting a sentance without eating up the words?

Was that typo in the title intentional or are on the drink

Do you mean in the sense that it autocorrects the words for you, or in the sense that if you try to add a letter to the middle of a word it replaces the next letter? In the latter case just find the "insert"("ins") button and press it.