________ allows to you view formatting changes to selected text without actually applying those changes

Which of the following display screens does not require a backlight to function?

a. organic light-emitting diode (OLED) display b. liquid crystal display (LCD) c. light-emitting diode (LED) display d. cathode ray tube (CRT)

If you do something unintentionally, you can cancel the last event by clicking the ________ button on the Quick Access toolbar

Fill in the blank(s) with correct word