function - n. the special purpose or activity for which a thing exists or is used
undo - v. to change or stop the effect of (something) : reverse
attachment - n. a document or file that is sent with e-mail
click - v. to press a button on a mouse or some other device in order to make something happen on a computer
gear - n. a toothed wheel in a machine
icon - n.a small picture on a computer screen that represents a program or function
setting - n. a particular way of positioning the controls of a machine, system, etc., in order to produce a desired result
schedule - v. to plan (something) at a certain time
response - n. omething that is said or written as a reply to something
text - n. the words that make up the main part of a book, magazine, newspaper, Web site, etc.
automatic - adj. having controls that allow something to work or happen without being directly controlled by a person