You can set up LiveCycle Designer ES to identify spelling errors as you type by selecting the Check Spelling While Typing option in the Spelling panel of the Options dialog box.
When the Check Spelling While Typing option is selected, a wavy red line appears under misspelled words in text objects, caption fields, or the various fields in the Object and Accessibility palettes, regardless of the options selected. You can use the options in the Spell Check list to specify the type of text to spell check when you use the Check Spelling dialog box.
When checking the spelling in a form, LiveCycle Designer ES always refers to the internal dictionary and your custom dictionary (My Custom Dictionary). You can also add other custom dictionary files (*.clam) to expand the list of correctly spelled words to which LiveCycle Designer ES refers. For more information, see Adding a word to the list of ignored words.
Tip:
To see a list of the dictionaries you currently have available, select Tools > Options, and click Spelling. The Spelling panel displays a list of the installed dictionaries. Notice that My Custom Dictionary is selected at all times and cannot be removed.
When the Check Spelling While Typing option is selected, a wavy red line appears under misspelled words in text objects and caption fields only when the insertion point (vertical, flashing bar used for entering text) is placed in or directly next to text.
You can quickly correct spelling errors by right-clicking a misspelled word and selecting one of the suggested words from the context menu. LiveCycle Designer ES displays a maximum of four alternate spelling suggestions on the context menu for each misspelled word. To see more than four suggestions, use the Check Spelling dialog box.
1.
To set up LiveCycle Designer ES to identify spelling errors as you type, select Tools > Options and, in the Spelling panel, select Check Spelling While Typing.
To correct the misspelled word, select one of suggested words in the context menu. If no spelling suggestions are available for the misspelled word, the text no spelling suggestions appears instead.
To add the word to My Custom Dictionary, select Add to Dictionary. This selection adds the underlined word to all languages in the dictionary. LiveCycle Designer ES no longer identifies the word as being misspelled.
To disregard all occurrences of the misspelled word, select Ignore All. This selection adds the word to the list of ignored words, and LiveCycle Designer ES temporarily does not identify the word as being misspelled. All spell checks disregard the word until you restart LiveCycle Designer ES. The list of ignored words is cleared each time LiveCycle Designer ES is started.
See also 

To check spelling while you type