Click the Dictionary button at the side of the notices window to open a window that shows all the words you have added to it. It does not show the words that the dictionary knows by default — only the ones you’ve added to it. This window also has an add button you can use to add words to the dictionary. To delete a word from the dictionary, click the red X beside the word in the dictionary window. Before closing this window, remember to click Save to save changes you’ve made.